Bayern Munich W v Mainz 05 W — prediction, stats and goal analysis

Frauen-Bundesliga (W) · Monday, 31 August 2026. Final score 2–0 (half-time 1–0). Rebuilt from the season as it stood that morning, our rating would have been 69% for over 2.5 goals. This match is older than our frozen ratings ledger, which keeps 30 days, so that figure is a reconstruction from pre-match data rather than a number we published at the time — a distinction worth making, because only the frozen ones prove what we actually said beforehand.

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Our ratings for this match

The result model puts Bayern Munich W at 83%, the draw at 12% and Mainz 05 W at 6%, from expected goals of 3 and 0.71.

How we got this number

The league sets the starting point. Frauen-Bundesliga (W) has produced over 2.5 goals in 67% of its matches, and that is where a team with no record of its own would sit.

Each side's own record. Bayern Munich W have 1 in 1 this season, Mainz 05 W 1 in 1. Those records are pulled toward the league rate with the weight of about 24 matches — enough that two or three unusual games cannot swing a rating — giving 68% and 68%.

Last season still counts, briefly. With 1 and 1 games played this season, last season's rates are still blended in and fade out entirely by game 40 — the point at which our testing showed they stop adding accuracy. A single season is part luck, so each club's record is first pulled toward the league average by 34 games' weight. That moves the two figures to 70% and 68%.

The mix. Weighted 40% home side, 40% away side and 20% league — the split that beat every alternative across 30,582 matches of testing — that gives 68%.

Goal expectation. Separately a Poisson model built from attack and defence strength — using real expected-goals data where the league has it — puts this match at 72%, from expected goals of 3 for Bayern Munich W and 0.71 for Mainz 05 W. Folding in 30% of that view gives 69%.

This breakdown is generated from the same inputs the rating uses, so it cannot describe a calculation we did not perform. The full model is set out in the methodology.

Season form

More: Bayern Munich W season stats · Mainz 05 W season stats · Frauen-Bundesliga (W) table and form. Ratings are calibrated probabilities, not tips — a 60% call is expected to miss two times in five.