Favorites or Underdogs?

A research tool for one specific question most bettors never ask: how favorites and underdogs have actually performed, depending on where, on what, against whom and at what price. 41,000+ ATP main-draw matches since 2010, filterable by tournament, type, surface, round, odds range — and player by player.

No. FavOrDog gives you the historical record; the conclusions and the bets are yours. Past performance never guarantees future results — and any tool that tells you otherwise is selling you something else.

Prices you personally could have taken vary by bookmaker, by timing and by how limited your account is — there is no consistent way to measure against them. The close is the market's final and sharpest estimate, which makes it the one yardstick everyone can compare notes on.

Because prices are set by a market, and markets carry the habits of the people betting into them. Longshots attract money for reasons that have nothing to do with probability, and that pressure shows up in the odds — in some contexts far more than others. Roland Garros is the clearest example in the whole database: backing underdogs there returned −17.9% across 2,127 matches, and the longer the price, the worse it got. That is not a run of bad luck; it's a structural tilt, sitting in plain sight, that almost nobody measures. Finding where the tilt is steepest is what this tool is for. Deciding whether to act on it is your job, not mine.

Because Pinnacle is where serious bettors price the market. It runs on low margins and high limits, it welcomes winners instead of restricting them, and its closing line is widely treated as the most efficient number available in tennis. Measuring against it means the results here are not flattered by a soft price nobody could actually get. One consequence worth knowing: if you bet through a broker, with several books and exchanges to choose from, you should regularly beat the Pinnacle close — which makes every ROI figure in this app a conservative floor rather than a ceiling.

Two, and you switch between them with one click. Flat stake is one unit on every match — simple, but it lets a couple of lucky longshots inflate a player's ROI. Unit impact follows how bettors really bet: bigger stakes on short prices, smaller ones on longshots. Each bet is sized so the gap between winning and losing is always exactly 1u — at odds 2.00 you stake 0.50u, at 1.50 you stake 0.67u, at 5.00 just 0.20u — so every match moves the bankroll by the same amount. If a pattern survives both methods, it's more likely to be real. It's a robustness check, not a betting system. Unit impact is based on the method introduced by Barge-Gil & García-Hiernaux (2019) — read the paper.

On its own, no — and nobody selling you a tool can honestly promise that. What it does is replace assumptions with the actual record, so your decisions rest on something firmer than folklore.

€300 for 12 months of full access. One-time payment, no monthly plan, no auto-renewal surprises.

Open an account at one of our partner brokers (BetInAsia or MadMarket) through our link and deposit at least €50. You get the same 12 months of full access at no cost — plus 0.11% lifetime cashback on all your bets.

No trial — but the broker route above is a genuine €0 path to the full product for 12 months.

Not in the current version. All analysis happens inside the app, with charts and data tables side by side.

Every week during the season, once the tour's matches are complete and priced — same sources, same rules as the historical data. Every view in the app carries the date of the most recent match loaded, so you always know exactly how current the numbers in front of you are.