6 short answers, each with its formula or table, a worked example on our corpus, its sources and a FAQ. What we know, with its measurement; what we do not know, said as such.
A value bet is a bet whose odds exceed the fair odds. Formula EV = p × c − 1, worked example, where the probability comes from, and what 59,960 ATP matches show about how rare value is.
How to convert decimal odds into a probability, compute the bookmaker's margin, and why closing odds say more than opening odds. Average margin measured on the corpus since 2021.
A hit rate proves nothing on its own: compare it with the market favourite on the same matches, measure on unseen seasons and judge ROI at flat stakes. Evaluation grid and published figures.
Comparison of open tennis results databases (tennis-data.co.uk, Jeff Sackmann, Valuebetennis): period, columns, odds, licence, freshness, and a five-line analysis example.
Tennis Abstract, TennisExplorer, OddsPortal, Flashscore, tennis-data.co.uk, Jeff Sackmann, Ultimate Tennis Statistics and Valuebetennis compared: coverage, odds, match statistics, access, language, and what each is best for.
Value bet, decimal odds, implied probability, margin, closing odds, CLV, Kelly, ROI, drawdown, walk-forward, tie-break, retirement, ranking, points: each term defined in one or two sentences, with figures from our corpus where they exist.
To go further: the full methodology, the model's measured accuracy, the data as CSV.