Rotherham 4-1 Portsmouth – Result & Analysis
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Poisson model rates Rotherham at 46%, yet other data sources diverge — this Rotherham vs Portsmouth fixture contains genuine analytical tension.
✍️ Match Preview
Full Analysis
AESSEAL New York Stadium plays host to Rotherham versus Portsmouth in League One, Regular Season - 13. Kick-off: Saturday 16 October 2021 at 15:00 UTC.
Current Form
Rotherham's overall League One record this term: 5W 2D 3L from 10 games (1.70 PPG). Last five: D W D W W. They are averaging 1.40 goals per game and conceding 0.90 — a modest attacking output that tempers optimism on the Over 2.5 market. 5 clean sheets from 10 games (50%) is a standout defensive return — they are keeping their net clean in more than half their matches. Both teams have scored in just 30% of their matches, indicating a tendency toward clean sheets or low-scoring outcomes. This season is still relatively young for Rotherham, so this record blends games from this season and last.
At home at AESSEAL New York Stadium, Rotherham have gone 3W 1D 2L this season (6 games, 1.67 PPG). At home they are averaging 1.67 goals scored and 1.17 conceded per game. 3 clean sheets from 6 home games (50%) — they are an exceptionally hard side to score against at AESSEAL New York Stadium.
Portsmouth have collected 1.20 PPG across 10 League One outings this season: 3W 3D 4L. Last five: L D D L W. Their scoring rate of 1.30 per game is modest, conceding 1.00 — not a side to back heavily on the Over 2.5 from their form alone. 4 clean sheets in 10 outings (40%) underlines their defensive solidity. This season is still relatively young for Portsmouth, so this record blends games from this season and last.
Portsmouth away from home this season: 1W 2D 3L from 6 away games — 0.83 PPG on the road. Away from home they average 0.67 goals scored and 1.00 conceded per game.
The points-per-game gap of 0.50 in Rotherham's favour (1.70 vs 1.20) is a statistically meaningful difference. The hosts are the form pick here, with draw protection the sensible hedge given the away side's competitiveness.
Trading
Rotherham half-time and goal-timing data (11 games, 6 at home): they score before half-time in 67% of fixtures in home games; when goalless at HT, a second-half goal follows 100% of the time; two or more arrive in the second half on 60% of those occasions; they lead at the break 54% of the time; BTTS occurs in 33% of their matches (home games); Over 2.5 goals lands in 33% of games (home games); they keep a clean sheet 54% of the time.
Portsmouth half-time and goal-timing data (11 games, 6 at away): they score before half-time in 33% of fixtures in away games; when goalless at HT, a second-half goal follows 80% of the time; BTTS occurs in 33% of their matches (away games); Over 2.5 goals lands in 33% of games (away games); they keep a clean sheet 46% of the time.
The in-play data supports BTTS No — both teams show low combined scoring rates (Rotherham 27% | Portsmouth 36%). Under 2.5 goals has backing from the in-play data — both teams register low Over 2.5 rates (Rotherham 18% | Portsmouth 46%).
Poisson Model
The Poisson distribution model projects Rotherham 1.33 xG and Portsmouth 0.95 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: Rotherham attack 1.039 / defence 1.145 | Portsmouth attack 0.658 / defence 1.095. League average goals — home 1.173 / away 1.262. Data: 11 Rotherham games / 11 Portsmouth games used (CurrentSeason).
Result probabilities: Rotherham 46% | Draw 28% | Portsmouth 27%. Fair-value odds: Rotherham 2.17 | Draw 3.57 | Portsmouth 3.70. Rotherham hold a narrow Poisson edge at 46% — the draw (28%) is close enough to merit draw-inclusive market consideration.
Goals markets: Over 2.5 probability 40% | BTTS probability 45% | Total xG 2.29. Under 2.5 has a narrow probability edge at 60% — total xG of 2.29 is below the line but not decisively so. BTTS probability of 45% is moderate — neither team is projected to score with enough certainty to make Yes a clear standalone call.
Verdict
The Poisson model's primary lean is Rotherham at 46% — moderate model lean. Current-season form corroborates the Poisson lean — partial multi-source support. Draw probability of 28% warrants consideration of Double Chance or Draw No Bet on Rotherham if the outright odds are short.
The Poisson model projects 2.29 xG in total — Under 2.5 at 40% — Poisson-only — limited corroboration confidence.
Poisson assigns a 45% probability to BTTS No based on the attack/defence strength model. Form rates corroborate: Rotherham 33% | Portsmouth 33% BTTS from recent games.
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💡 Key Insights
🏟️ Match Context
• Fixture: Rotherham vs Portsmouth | Competition: League One, Regular Season - 13 | Venue: AESSEAL New York Stadium • Kick-off: Saturday 16 Oct 2021, 15:00 UTC • Data inputs: H2H history, form splits, prediction model signals, and market pricing
📊 Statistical Prediction
• Poisson result probabilities: Rotherham 46% | Draw 28% | Portsmouth 27% • Poisson goal markets: Over 2.5 40% | BTTS 45% | xG Rotherham 1.33 / Portsmouth 0.95 • Poisson strength factors: Rotherham attack 1.039 / def 1.145 | Portsmouth attack 0.658 / def 1.095 | league avg home 1.173 / away 1.262 • Poisson stance: Rotherham (46%) — moderate lean
🧮 Prediction Model
1.33
Rotherham xG
Expected Goals
0.95
Portsmouth xG
45%
BTTS
67%
Over 1.5
40%
Over 2.5
20%
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 Rotherham vs Portsmouth kick off?
Rotherham vs Portsmouth kicked off at 15:00 on Saturday 16 October 2021 at AESSEAL New York Stadium.
What was the final score in Rotherham vs Portsmouth?
Rotherham 4 - 1 Portsmouth.
Where is Rotherham vs Portsmouth being played?
The match is being played at AESSEAL New York Stadium.
What competition is Rotherham vs Portsmouth part of?
Rotherham vs Portsmouth is a Regular Season - 13 fixture in the League One (England).
Who is favourite to win Rotherham vs Portsmouth?
Our statistical model gives Rotherham a 46% chance of winning, Portsmouth a 27% chance, and a 28% chance of a draw — making Rotherham the favourite.
Will both teams score in Rotherham vs Portsmouth?
Our model estimates a 45% probability that both Rotherham and Portsmouth will score (BTTS).
Will Rotherham vs Portsmouth have over 2.5 goals?
Our model puts the probability of over 2.5 goals in this match at 40%.
What is the head-to-head record between Rotherham and Portsmouth?
No recorded head-to-head meetings available in the dataset.
What form are Rotherham and Portsmouth in?
Rotherham (all comps): 5W-2D-3L in 10 | 1.70 PPG | GF 1.40 / GA 0.90 | L5 D-W-D-W-W. Portsmouth (all comps): 3W-3D-4L in 10 | 1.20 PPG | GF 1.30 / GA 1.00 | L5 L-D-D-L-W.
🧮 Model Insight
Where the Numbers Come From
Working from Rotherham's attack rating (1.04) and Portsmouth's defence rating (1.09), the model arrives at 1.33 expected goals for the home side. Flip it around — Portsmouth's attack (0.66x) against Rotherham's defence (1.15x) — and the away total comes out at 0.95.
These ratings are built from 11/11 games of current-season data — a full enough sample to trust.
The Exact-Score Picture
Run the expected-goals figures through the full scoreline distribution and 1-1 emerges as the single most likely result, at 14.6%. Close behind: 1-0 (11.9%), 0-0 (11.9%). Those top three scorelines alone account for 38% of the model's total probability mass — a relatively concentrated, predictable distribution for this fixture.
Most Likely Outcome
Rotherham Win
46%
2.20
28%
3.60
27%
3.75
Top 3 Most Likely Scorelines
1 – 0
13.6%
Home win
Most likely
1 – 1
12.9%
Draw
0 – 0
10.2%
Draw
Expected Goals & Win Odds
1.33
Rotherham xG
Total xG
2.29
0.95
Portsmouth xG
2.20
46%
Home win
3.60
28%
Draw
3.75
27%
Away win
Goals Markets
67%
Over 1.5
1.49
33%
Under 1.5
3.03
40%
Over 2.5
2.50
60%
Under 2.5
1.67
20%
Over 3.5
5.00
80%
Under 3.5
1.25
8%
Over 4.5
12.50
92%
Under 4.5
1.09
Match Markets
Both Teams to Score
45%
BTTS Yes
2.21
55%
BTTS No
1.83
Clean Sheet
39%
2.59
26%
3.80
Win to Nil
18%
5.68
7%
14.23
Score Probability Matrix (%)
| H \ A | 0 | 1 | 2 | 3 | 4 | 5 |
|---|---|---|---|---|---|---|
| 0 | 10.2 | 9.7 | 4.6 | 1.5 | 0.3 | 0.1 |
| 1 | 13.6 | 12.9 | 6.1 | 1.9 | 0.5 | 0.1 |
| 2 | 9.1 | 8.6 | 4.1 | 1.3 | 0.3 | 0.1 |
| 3 | 4.0 | 3.8 | 1.8 | 0.6 | 0.1 | – |
| 4 | 1.3 | 1.3 | 0.6 | 0.2 | – | – |
| 5 | 0.4 | 0.3 | 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 Rotherham vs Portsmouth?
Our Poisson model rates 1-1 as the single most likely exact scoreline, at 14.6%.
How many goals are Rotherham and Portsmouth expected to score?
The model projects 1.33 expected goals for Rotherham and 0.95 for Portsmouth, a combined total of 2.29.
How confident is the prediction model for Rotherham vs Portsmouth?
Not very — the model's leading outcome sits at just 46%, meaning this is rated as a genuinely open contest with no dominant favourite.
📈 Form Insight
Recent Form Overview
Across their last 11 outings, Rotherham have picked up 1.82 PPG on a 6W 2D 3L record — D-W-D-W-W across the most recent five. The sample for Rotherham is still a mix of this season and last, given how young the current campaign is.
Portsmouth's form line: 4W 3D 4L from 11 games, 1.36 PPG, last five L-D-D-L-W. The sample for Portsmouth is still a mix of this season and last, given how young the current campaign is.
Put side by side, Rotherham are the form team by 0.46 points per game — a gap wide enough to matter, though form alone rarely tells the whole story against Portsmouth.
How They Fare by Venue
On home soil, Rotherham have posted 1.67 PPG from 6 outings (3W 1D 2L).
On the road, Portsmouth have gone 1W 2D 3L from 6 away games — 0.83 PPG when travelling. That's a step down from their 1.36 PPG overall record — away form has been the weaker part of Portsmouth's season.
Comparing the two in their relevant venue splits, Rotherham come out ahead — a more targeted read than the overall PPG figures above, since it strips out games played in the opposite context.
Attack vs Defence
Rotherham are averaging 1.45 goals scored and 0.82 conceded per game recently; Portsmouth are on 1.27 scored and 0.91 conceded. Both sides have been difficult to break down recently — a combination that often points to a tighter, lower-scoring game than the average fixture.
On BTTS specifically: Rotherham have seen both teams score in 27% of their recent games.
Defensively: Rotherham have kept a clean sheet in 55% of their games; Portsmouth in 45% — worth knowing if you're weighing up clean-sheet or BTTS-No markets.
Last 11 Results — League One
Current season: same league only · Previous season: all leagues (covers promoted/relegated teams)
Rotherham
Blended
Portsmouth
Blended
❓ Frequently Asked Questions
What form are Rotherham and Portsmouth in coming into this match?
Rotherham have gone 6W 2D 3L in their last 11 games (1.82 PPG), while Portsmouth have gone 4W 3D 4L in their last 11 (1.36 PPG).
Which team has the better venue record — Rotherham at home or Portsmouth away?
Rotherham's home record (1.67 PPG) is the stronger of the two venue-specific splits — Rotherham at home: 1.67 PPG; Portsmouth away: 0.83 PPG.
Have Rotherham or Portsmouth been keeping clean sheets recently?
Rotherham have kept a clean sheet in 55% of their recent games, Portsmouth in 45%.
⚔️ Rivalry Insight
The Rivalry So Far
These sides have met 2 times that we have on record, stretching back to October 2021 — a rivalry that has played out across roughly 1 year. Every recorded meeting has come in League One. It has been a while since the last meeting — 12 April 2022, some 1 year back — so squads and form on both sides may look very different now.
Last 2 Meetings
1
Rotherham
0
Draws
1
Portsmouth
Recent Meetings
❓ Frequently Asked Questions
What is the head-to-head record between Rotherham and Portsmouth?
From 2 meetings on record, Rotherham have won 1, Portsmouth have won 1, and 0 have been drawn.
When did Rotherham and Portsmouth last play each other?
They last met on 12 April 2022, when Portsmouth 3-0 Rotherham.
📈 Trading Insight
Early Goal Trends
Rotherham are typically involved in an early goal — the half-time board shows at least one in 67% of their matches. They've gone in front at half-time 67% 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.
Portsmouth see a goal before the break in 33% of their matches.
Full-Time Markets
Neither side has been leaking BTTS chances often — 33% (Rotherham) and 33% (Portsmouth) both sit on the low side, favouring BTTS No.
Low-scoring games have been more typical here — Over 2.5 sits at just 33% for Rotherham and 33% for Portsmouth.
On the defensive side: Rotherham keep a clean sheet in 50% of their matches; Portsmouth in 33%; Portsmouth in 50%.
Current season: same league only. Previous season: all leagues (covers promoted/relegated teams). All = any venue | Venue = Rotherham home games / Portsmouth away games. HT metrics require half-time score data — shown as — where unavailable.
❓ Frequently Asked Questions
Do both teams usually score when Rotherham play Portsmouth?
Not especially — both teams scoring has occurred in only 33% of Rotherham's recent matches and 33% of Portsmouth's, a rate that leans toward BTTS No.
Is Rotherham vs Portsmouth usually a high-scoring fixture?
Not particularly — Over 2.5 goals has come in for only 33% of Rotherham's recent games and 33% of Portsmouth's, pointing to a tighter contest.
Do Rotherham and Portsmouth tend to score early?
Rotherham have had a goal before half-time in 67% of their recent matches, Portsmouth in 33% — a useful reference point for first-half goal markets.
Dominant Rotherham run riot with a 4-1 hammering of Portsmouth.
📝 Match Report
How It Unfolded
Rotherham beat Portsmouth 4-1 at AESSEAL New York Stadium, Regular Season - 13, in the League One. That is the final score; the rest of this report grades it against what the data forecast beforehand.
The Model vs The Result
The Poisson model went into this projecting Rotherham 1.33 xG and Portsmouth 0.95 xG, a combined 2.29. The scoreboard read 4-1 for 5 actual goals. Rotherham beat their projection by 2.7 — clinical relative to the chances the model priced in. Those figures were built on strength ratings of Rotherham attack 1.04 / defence 1.15 against Portsmouth attack 0.66 / defence 1.09, drawn from 11/11 games (CurrentSeason).
On the result, the model split it Rotherham 46% | Draw 28% | Portsmouth 27%, with Rotherham to win its most likely call at 46%. The scoreboard confirmed the model's leading pick.
Goals & Markets
The model rated Over 2.5 goals at 40%. The game delivered 5, so it went over — a miss for the goals model. Over 1.5 had been 67% and landed. Over 3.5 was 20% and came in. On both teams to score, the model sat at 45% and the match saw both sides score — a miss on BTTS. Historically the two sides average 32% Over 2.5 across their same-competition games (Rotherham 18%, Portsmouth 46%), a base rate that pointed the other way from today's over. Their combined BTTS history runs at 32%, which did not match the both-scored outcome.
Trading Patterns vs Reality
Rotherham's trading profile (11 games, 6 home) set some clear expectations: BTTS lands in 27% of their matches — today it did; they keep a clean sheet 54% of the time, and conceded here.
Portsmouth's trading profile (11 games, 6 away) set some clear expectations: BTTS lands in 36% of their matches — today it did; they keep a clean sheet 46% of the time, and conceded here.
Form vs Result
On form, Rotherham arrived the stronger side — 1.82 PPG against 1.36. The form guide was vindicated by the result. Rotherham (home/away splits) scored 4 against a 1.67 average — above their attacking norm. Portsmouth (home/away splits) shipped 4 against a 1.00 concession average — a leakier day than usual.
Verdict
Grading the result against the stored data, 2 of 4 pre-match signals came in: result (hit), Over 2.5 (miss), BTTS (miss), form (hit). A mixed scorecard — the data caught the broad shape of the game but not every market.
💡 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.