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Poisson model rates AS Roma at 49%, yet other data sources diverge — this AS Roma vs Lazio fixture contains genuine analytical tension.

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Analysis

Lazio make the trip to Stadio Olimpico to face AS Roma in Serie A, Regular Season - 37. The match kicks off on Sunday 17 May 2026 at 11:00 UTC.

Current Form

AS Roma's overall Serie A record this term: 5W 2D 3L from 10 games (1.70 PPG). Last five: W D W W W. They are averaging 2.10 goals per game — a high-scoring output that makes them a genuine attacking threat in any fixture. 4 clean sheets in 10 games (40%) reflects a solid defensive base. Both teams have scored in 60% of their games — a high BTTS rate that carries real weight in the goals markets.

In front of their own supporters this season, AS Roma have posted 7W 3D 0L at Stadio Olimpico — 2.40 PPG. They are averaging 2.30 goals per home game — a prolific scoring rate in front of their own fans. 6 clean sheets from 10 home games (60%) — they are an exceptionally hard side to score against at Stadio Olimpico. Their home PPG of 2.40 is noticeably stronger than their overall 1.70 — AS Roma are significantly better at Stadio Olimpico than their overall form suggests.

Lazio have collected 1.70 PPG across 10 Serie A outings this season: 5W 2D 3L. Last five: L W D W L. Their scoring rate of 1.30 per game is modest, conceding 1.20 — not a side to back heavily on the Over 2.5 from their form alone. 3 clean sheets from 10 outings suggests some defensive organisation.

Lazio's form when playing away from home: 4W 4D 2L across 10 road games this term (1.60 PPG). Away from home they average 1.00 goals scored and 0.70 conceded per game. 5 away clean sheets from 10 games (50%) — they are as difficult to score against on the road as they are at home. Away from home, both teams have scored in only 30% of games — a low rate that backs BTTS No when they travel.

Neither side holds a meaningful form edge. The 1.70 vs 1.70 PPG split is negligible — model and market signals should carry more analytical weight for this one.

H2H Analysis

The head-to-head record is closely matched — AS Roma lead 4W to 3W over the last 9 encounters, with 2 draws, though neither side has established a commanding advantage.

Historically, goals have been at a premium in this fixture — just 1.8 per game from 9 meetings. The Under 2.5 has a clear base rate from the H2H record alone. The most recent clash, on 21 Sep 2025, ended 1–0 with AS Roma winning.

With a balanced win record and just 1.8 goals per game historically, the H2H points toward a tight, low-scoring contest. Under 2.5 goals has the strongest statistical grounding from the fixture history regardless of which side wins.

Trading Data

AS Roma goal-timing and half-time pattern breakdown (74 games, 37 at home): they score before half-time in 70% of fixtures in home games; when goalless at HT, a second-half goal follows 92% of the time; BTTS occurs in 38% of their matches (home games); Over 2.5 goals lands in 43% of games (home games); they keep a clean sheet 43% of the time.

Lazio goal-timing and half-time pattern breakdown (74 games, 37 at away): they score before half-time in 60% of fixtures in away games; when goalless at HT, a second-half goal follows 74% of the time; BTTS occurs in 32% of their matches (away games); Over 2.5 goals lands in 38% of games (away games).

BTTS rates are mixed from the trading data — AS Roma 42% versus Lazio 46%; no strong lean in either direction. The over/under 2.5 picture is inconclusive from the in-play data (AS Roma 39% | Lazio 46%).

Poisson Model

The Poisson distribution model projects AS Roma 1.28 xG and Lazio 0.75 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: AS Roma attack 1.352 / defence 0.719 | Lazio attack 0.926 / defence 0.759. League average goals — home 1.248 / away 1.131. AS Roma carry an above-average attack strength of 1.352 — their λ of 1.28 reflects genuine attacking quality above the league norm. Lazio's defence strength of 0.759 is below average — they are conceding at a rate that inflates the home xG figure. AS Roma's defence rating of 0.719 is below average — the home backline is amplifying the visitor's projected output. Data: 74 AS Roma games / 74 Lazio games used (CurrentSeason).

Result probabilities: AS Roma 49% | Draw 30% | Lazio 22%. Fair-value odds: AS Roma 2.04 | Draw 3.33 | Lazio 4.55. AS Roma hold a narrow Poisson edge at 49% — the draw (30%) is close enough to merit draw-inclusive market consideration.

Goals markets: Over 2.5 probability 33% | BTTS probability 39% | Total xG 2.04. Under 2.5 is the strongly backed market at 67% probability — total xG of 2.04 sits well below the 2.5 threshold. The model is projecting a tight, low-scoring match based on both sides' defensive quality. BTTS probability of 39% is moderate — neither team is projected to score with enough certainty to make Yes a clear standalone call.

Final Verdict

Poisson rates AS Roma as the most likely outcome at 49% — moderate model lean. Draw probability of 30% warrants consideration of Double Chance or Draw No Bet on AS Roma if the outright odds are short.

The Poisson model projects 2.04 xG in total — Under 2.5 at 33% — reasonable confidence, supported by H2H averaging 1.8 goals per meeting.

Poisson assigns a 39% probability to BTTS No based on the attack/defence strength model. Form rates corroborate: AS Roma 40% | Lazio 30% BTTS from recent games.

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