Portsmouth 1-0 Bolton – Result & Analysis
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Poisson model rates Bolton at 40%, yet other data sources diverge — this Portsmouth vs Bolton fixture contains genuine analytical tension.
✍️ Match Preview
Analysis & Preview
A League One encounter, Regular Season - 16 sees Bolton travel to Fratton Park to take on Portsmouth. The game is scheduled for Saturday 30 October 2021, 15:00 UTC.
Form Analysis
Looking at all fixtures this season, Portsmouth stand at 1W 3D 6L from 10 League One matches — 0.60 PPG. Last five: L W L L D. They are averaging 1.30 goals per game and conceding 2.00 — a modest attacking output that tempers optimism on the Over 2.5 market. However, 2.00 goals conceded per game is a concern — opposing attacks have exploited them regularly. 1 clean sheet from 10 outings provides some defensive foundation. Both teams have scored in 60% of their games — a high BTTS rate that carries real weight in the goals markets. This season is still relatively young for Portsmouth, so this record blends games from this season and last.
Portsmouth at Fratton Park this season: 3W 1D 2L from 6 home games — 1.67 PPG on home soil. At home they are averaging 1.67 goals scored and 1.33 conceded per game. 3 clean sheets from 6 home games (50%) — they are an exceptionally hard side to score against at Fratton Park. Their home PPG of 1.67 is noticeably stronger than their overall 0.60 — Portsmouth are significantly better at Fratton Park than their overall form suggests.
Bolton — All Games: 3W 2D 5L from 10 League One fixtures this season — 1.10 PPG. Last five: W L L L D. Their scoring rate of 1.30 per game is modest, conceding 1.70 — not a side to back heavily on the Over 2.5 from their form alone. 1 clean sheet from 10 outings suggests some defensive organisation. This season is still relatively young for Bolton, so this record blends games from this season and last.
Bolton's away record: 3W 1D 4L from 8 road trips in League One this season (1.25 PPG). Away from home they average 1.62 goals scored and 1.50 conceded per game.
Form points away from home here. Bolton's 1.10 PPG return is 0.50 points per game ahead of Portsmouth's 0.60 — the visitors are the form-based selection, and Double Chance is an alternative worth pricing if the outright looks tight.
In-Play Data
Portsmouth trading profile (14 games, 6 at home): they score before half-time in 83% of fixtures in home games; when goalless at HT, a second-half goal follows 80% of the time; BTTS occurs in 33% of their matches (home games); Over 2.5 goals lands in 67% of games (home games); Over 3.5 in 43%.
Bolton trading profile (14 games, 6 at away): they score before half-time in 83% of fixtures in away games; when goalless at HT, a second-half goal follows 67% of the time; BTTS occurs in 33% of their matches (away games); Over 2.5 goals lands in 50% of games (away games); Over 3.5 in 36%; they fail to score in 50% of games.
BTTS rates are mixed from the trading data — Portsmouth 43% versus Bolton 43%; no strong lean in either direction. The over/under 2.5 picture is inconclusive from the in-play data (Portsmouth 57% | Bolton 57%).
Poisson Model
The Poisson distribution model projects Portsmouth 1.49 xG and Bolton 1.60 xG. These expected goals figures are the primary input: they feed a goal-probability matrix across all scoreline combinations to derive the result and market probabilities below. Underlying strength ratings: Portsmouth attack 1.047 / defence 1.243 | Bolton attack 0.943 / defence 1.248. League average goals — home 1.140 / away 1.362. Bolton bring a strong defensive rating of 1.248 — this is suppressing Portsmouth's projected output below what their attack strength alone would suggest. Data: 14 Portsmouth games / 15 Bolton games used (CurrentSeason).
Result probabilities: Portsmouth 36% | Draw 24% | Bolton 40%. Fair-value odds: Portsmouth 2.78 | Draw 4.17 | Bolton 2.50. This is a low-confidence result — no outcome exceeds 45%. The draw at 24% is a primary outcome, not an afterthought.
Goals markets: Over 2.5 probability 60% | BTTS probability 62% | Total xG 3.08. Over 2.5 holds a meaningful probability edge at 60% — the 3.08 total xG provides moderate support, though the model is not projecting a high-scoring game. BTTS Yes at 62% reflects that both xG figures (1.49 / 1.60) are above the threshold where scoring blanks become the primary outcome — both sides are projected to find the net.
Our Verdict
Poisson rates Bolton as the most likely outcome at 40% — marginal model lean. Current-season form corroborates the Poisson lean — partial multi-source support. With a 24% draw probability, Draw No Bet on Bolton offers a more defensible entry point than the straight win. The opposing side holds a 36% win probability per the model — this is not a banker and should be staked accordingly.
The Poisson model projects 3.08 xG in total — Over 2.5 at 60% — reasonable confidence, supported by form averaging 3.1 goals per game.
On the BTTS market, Poisson puts 62% on Yes. This conflicts with form data: Portsmouth 33% | Bolton 38% from recent games — a notable divergence.
The outsider holds a 36% win probability per the model — this is not a banker and should not be treated as one. Proportionate stakes are appropriate given the genuine contest the data projects.
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💡 Key Insights
🏟️ Match Context
• Fixture: Portsmouth vs Bolton | Competition: League One, Regular Season - 16 | Venue: Fratton Park • Kick-off: Saturday 30 Oct 2021, 15:00 UTC • Data inputs: H2H history, form splits, prediction model signals, and market pricing
📊 Statistical Prediction
• Poisson result probabilities: Portsmouth 36% | Draw 24% | Bolton 40% • Poisson goal markets: Over 2.5 60% | BTTS 62% | xG Portsmouth 1.49 / Bolton 1.60 • Poisson strength factors: Portsmouth attack 1.047 / def 1.243 | Bolton attack 0.943 / def 1.248 | league avg home 1.140 / away 1.362 • Poisson stance: Bolton (40%) — low confidence — close contest
🧮 Prediction Model
1.49
Portsmouth xG
Expected Goals
1.60
Bolton xG
62%
BTTS
81%
Over 1.5
60%
Over 2.5
37%
Over 3.5
Full score-by-score matrix & model internals in the "Full Poisson Detail" section below ↓
⚠️ This analysis is generated algorithmically from statistical data and is intended for informational purposes only. It does not constitute betting advice. Please gamble responsibly.
❓ Frequently Asked Questions
What time does Portsmouth vs Bolton kick off?
Portsmouth vs Bolton kicked off at 15:00 on Saturday 30 October 2021 at Fratton Park.
What was the final score in Portsmouth vs Bolton?
Portsmouth 1 - 0 Bolton.
Where is Portsmouth vs Bolton being played?
The match is being played at Fratton Park.
What competition is Portsmouth vs Bolton part of?
Portsmouth vs Bolton is a Regular Season - 16 fixture in the League One (England).
Who is favourite to win Portsmouth vs Bolton?
Our statistical model gives Portsmouth a 36% chance of winning, Bolton a 40% chance, and a 24% chance of a draw — making Bolton the favourite.
Will both teams score in Portsmouth vs Bolton?
Our model estimates a 62% probability that both Portsmouth and Bolton will score (BTTS).
Will Portsmouth vs Bolton have over 2.5 goals?
Our model puts the probability of over 2.5 goals in this match at 60%.
What is the head-to-head record between Portsmouth and Bolton?
No recorded head-to-head meetings available in the dataset.
What form are Portsmouth and Bolton in?
Portsmouth (all comps): 1W-3D-6L in 10 | 0.60 PPG | GF 1.30 / GA 2.00 | L5 L-W-L-L-D. Bolton (all comps): 3W-2D-5L in 10 | 1.10 PPG | GF 1.30 / GA 1.70 | L5 W-L-L-L-D.
🧮 Model Insight
Model Mechanics
Portsmouth's attacking strength (1.05x league average) is weighed against Bolton's defensive record (1.25x) to produce a home expected-goals figure of 1.49. The same calculation in reverse, Bolton's attack versus Portsmouth's defence, projects 1.60 expected goals for the visitors.
These ratings are built from 14/15 games of current-season data — a full enough sample to trust.
Most Likely Scorelines
The model's single most probable exact score is 1-1, at 12.3%. Close behind: 1-2 (8.7%), 2-1 (8.1%). Together the top three scorelines make up 29% of the probability — a moderately spread distribution, typical of a competitive match-up.
Most Likely Outcome
Bolton Win
36%
2.80
24%
4.19
40%
2.48
Top 3 Most Likely Scorelines
1 – 1
10.9%
Draw
Most likely
1 – 2
8.7%
Away win
2 – 1
8.1%
Home win
Expected Goals & Win Odds
1.49
Portsmouth xG
Total xG
3.08
1.60
Bolton xG
2.80
36%
Home win
4.19
24%
Draw
2.48
40%
Away win
Goals Markets
81%
Over 1.5
1.23
19%
Under 1.5
5.26
60%
Over 2.5
1.67
40%
Under 2.5
2.50
37%
Over 3.5
2.70
63%
Under 3.5
1.59
20%
Over 4.5
5.00
80%
Under 4.5
1.25
Match Markets
Both Teams to Score
62%
BTTS Yes
1.62
38%
BTTS No
2.61
Clean Sheet
20%
4.93
23%
4.43
Win to Nil
7%
13.80
9%
10.98
Score Probability Matrix (%)
| H \ A | 0 | 1 | 2 | 3 | 4 | 5 |
|---|---|---|---|---|---|---|
| 0 | 4.6 | 7.3 | 5.8 | 3.1 | 1.2 | 0.4 |
| 1 | 6.8 | 10.9 | 8.7 | 4.6 | 1.8 | 0.6 |
| 2 | 5.1 | 8.1 | 6.5 | 3.4 | 1.4 | 0.4 |
| 3 | 2.5 | 4.0 | 3.2 | 1.7 | 0.7 | 0.2 |
| 4 | 0.9 | 1.5 | 1.2 | 0.6 | 0.3 | 0.1 |
| 5 | 0.3 | 0.4 | 0.4 | 0.2 | 0.1 | – |
Green = home win · Grey = draw · Amber = away win · Outlined cell = most likely score
▶ Model Internals
❓ Frequently Asked Questions
What is the most likely scoreline for Portsmouth vs Bolton?
Our Poisson model rates 1-1 as the single most likely exact scoreline, at 12.3%.
How many goals are Portsmouth and Bolton expected to score?
The model projects 1.49 expected goals for Portsmouth and 1.60 for Bolton, a combined total of 3.08.
How confident is the prediction model for Portsmouth vs Bolton?
Not very — the model's leading outcome sits at just 40%, meaning this is rated as a genuinely open contest with no dominant favourite.
📈 Form Insight
Where Both Sides Stand
Portsmouth come into this having played 14 games, going 4W 4D 6L for 1.14 points per game. Their last five reads L-W-L-L-D. The sample for Portsmouth is still a mix of this season and last, given how young the current campaign is.
On the other side, Bolton sit at 1.29 PPG from 14 outings (5W 3D 6L), a run that reads W-L-L-L-D across their last five. The sample for Bolton is still a mix of this season and last, given how young the current campaign is.
Form-wise this is close to level: Portsmouth on 1.14 PPG, Bolton on 1.29. Other factors will likely decide this one more than recent results.
Home Ground vs the Road
Portsmouth's home form reads 3W 1D 2L across 6 games on their own ground, a 1.67 PPG return. That's noticeably better than their 1.14 PPG overall — Portsmouth are a different proposition at home than their general record suggests.
Away from home, Bolton have taken 1.00 points per game from 6 outings (2W 0D 4L).
Comparing the two in their relevant venue splits, Portsmouth come out ahead — a more targeted read than the overall PPG figures above, since it strips out games played in the opposite context.
The Goals Picture
Portsmouth are averaging 1.21 goals scored and 1.43 conceded per game recently; Bolton are on 1.36 scored and 1.57 conceded.
Defensively: Portsmouth have kept a clean sheet in 36% of their games — worth knowing if you're weighing up clean-sheet or BTTS-No markets.
Last 14 Results — League One
Current season: same league only · Previous season: all leagues (covers promoted/relegated teams)
Portsmouth
Blended
Bolton
Blended
❓ Frequently Asked Questions
What form are Portsmouth and Bolton in coming into this match?
Portsmouth have gone 4W 4D 6L in their last 14 games (1.14 PPG), while Bolton have gone 5W 3D 6L in their last 14 (1.29 PPG).
Which team has the better venue record — Portsmouth at home or Bolton away?
Portsmouth's home record (1.67 PPG) is the stronger of the two venue-specific splits — Portsmouth at home: 1.67 PPG; Bolton away: 1.00 PPG.
Have Portsmouth or Bolton been keeping clean sheets recently?
Portsmouth have kept a clean sheet in 36% of their recent games, Bolton in 14%.
⚔️ Rivalry Insight
A Look Back
The fixture history between Portsmouth and Bolton runs to 6 recorded meetings, the earliest dating back to October 2021. Every recorded meeting has come in League One. It has been a while since the last meeting — 13 April 2024, some 2 years back — so squads and form on both sides may look very different now.
Digging Into the Numbers
The biggest gap between the sides came on 14 Jan 2023, when Bolton won 3-0 — the largest margin of victory on record between these two.
Portsmouth's record when hosting Bolton specifically: 3W 0D 0L from 3 games — a narrower, venue-specific slice of the head-to-head picture.
Last 6 Meetings
3
Portsmouth
2
Draws
1
Bolton
Recent Meetings
❓ Frequently Asked Questions
What is the head-to-head record between Portsmouth and Bolton?
From 6 meetings on record, Portsmouth have won 3, Bolton have won 1, and 2 have been drawn.
When did Portsmouth and Bolton last play each other?
They last met on 13 April 2024, when Bolton 1-1 Portsmouth.
Who has won more matches between Portsmouth and Bolton?
Portsmouth have the better head-to-head record, with 3 wins from 6 meetings.
📈 Trading Insight
Half-Time Trends
Portsmouth are typically involved in an early goal — the half-time board shows at least one in 83% of their matches. They've gone in front at half-time 50% of the time, though they've let that lead slip 17% of the time they've held it — worth watching if they're only ahead by one.
Bolton are typically involved in an early goal — the half-time board shows at least one in 83% of their matches.
The Numbers That Matter
Clean sheets have been more common than shared scoring for these two — Portsmouth 33% BTTS, Bolton 33%. That points toward BTTS No as the trading lean.
Over 2.5 has been close to a coin-flip for both sides — 67% (Portsmouth) and 50% (Bolton). Stepping up a level, Over 3.5 has also landed reasonably often — 50% and 33% respectively — worth a look for goal-hungry markets.
On the defensive side: Portsmouth keep a clean sheet in 50% of their matches; Bolton in 67%.
Current season: same league only. Previous season: all leagues (covers promoted/relegated teams). All = any venue | Venue = Portsmouth home games / Bolton away games. HT metrics require half-time score data — shown as — where unavailable.
❓ Frequently Asked Questions
Do both teams usually score when Portsmouth play Bolton?
Not especially — both teams scoring has occurred in only 33% of Portsmouth's recent matches and 33% of Bolton's, a rate that leans toward BTTS No.
Is Portsmouth vs Bolton usually a high-scoring fixture?
Recent trends suggest it could be — Over 2.5 goals has landed in 67% of Portsmouth's matches and 50% of Bolton's.
Do Portsmouth and Bolton tend to score early?
Portsmouth have had a goal before half-time in 83% of their recent matches, Bolton in 83% — a useful reference point for first-half goal markets.
Shock result as Portsmouth defy the odds to beat Bolton 1-0.
📝 Match Report
How It Unfolded
Portsmouth beat Bolton 1-0 at Fratton Park, Regular Season - 16, in the League One. With the result on the board, the sections below measure it against everything the model and the numbers projected in advance.
The Model vs The Result
The Poisson model went into this projecting Portsmouth 1.49 xG and Bolton 1.60 xG, a combined 3.08. The scoreboard read 1-0 for 1 actual goal. Bolton landed 1.6 under their projected return. Those figures were built on strength ratings of Portsmouth attack 1.05 / defence 1.24 against Bolton attack 0.94 / defence 1.25, drawn from 14/15 games (CurrentSeason).
On the result, the model split it Portsmouth 36% | Draw 24% | Bolton 40%, with Bolton to win its most likely call at 40%. The actual Portsmouth win had been the model's second-ranked read at 36%, so the result diverged from the top call without being a shock.
Goals & Markets
The model rated Over 2.5 goals at 60%. The game delivered 1, so it stayed under — the opposite of the projected direction. Over 1.5 had been 81% and missed. On both teams to score, the model sat at 62% and the match did not — a miss on BTTS. Historically the two sides average 57% Over 2.5 across their same-competition games (Portsmouth 57%, Bolton 57%), a base rate that pointed the other way from today's under. Their combined BTTS history runs at 43%, which matched the one-sided outcome.
Trading Patterns vs Reality
Portsmouth's trading profile (14 games, 6 home) set some clear expectations: BTTS lands in 43% of their matches — today it did not; they keep a clean sheet 36% of the time, and duly kept one.
Bolton's trading profile (14 games, 6 away) set some clear expectations: BTTS lands in 43% of their matches — today it did not; they fail to score in 50% of games, a blank that repeated today.
Form vs Result
The form lines were close — Portsmouth 1.14 PPG, Bolton 1.29 PPG — offering no strong steer, and the Portsmouth win broke the near-deadlock. Portsmouth (home/away splits) conceded 0 against a 1.33 average — tighter than their form line. Bolton (home/away splits) managed 0 against a 1.50 scoring average — below par going forward.
Verdict
Grading the result against the stored data, 0 of 3 pre-match signals came in: result (miss), Over 2.5 (miss), BTTS (miss). The data was on the wrong side of this result more often than not — a reminder that a single match sits well inside the model's variance.
💡 Key Insights
⚠️ This match report is generated algorithmically from the final score, our prediction model, and each team's historical form and trading data. Analysis is for informational purposes only.