In tennis, OddScore covers the match winner (Player 1 or Player 2, no draw). That's men's and women's singles at the Grand Slam, Masters 1000/ATP 500 and WTA 1000/500, main draw only. The method is the one used for football (odds movements, real probabilities, a 0-100 signal), worked out on 2 outcomes instead of 3.
One market, two outcomes: who wins?
In football, a match can end in a draw. In tennis, never. You play until somebody wins. So the market OddScore tracks boils down to one question: who wins, Player 1 or Player 2?
That's 2 outcomes, against 3 in football. The signal maths doesn't change. OddScore follows the odds movements, compares bookmakers, converts everything into real probabilities and produces a signal from 0 to 100. It just works on 2 outcomes instead of 3.
What about over/under on games?
Some bookmakers run an over/under on the total number of games in a match. OddScore doesn't track it for now. Not enough bookmakers cover it to get a reliable signal out of it.
A flimsy signal on a thinly covered market helps nobody. So OddScore sticks to the winner market, where there are enough bookmakers to compare the moves.
Reading a move on the winner market
Say Player 1's odds go from 1.80 to 1.50 at several bookmakers in the hours before a match. In tennis you've only got 2 prices to watch. When one shortens, the other drifts almost automatically. There's no third outcome to soak up the move.
To make sense of it, OddScore checks whether it shows up at several bookmakers at once. It also looks at when it happens compared with the start of play. A move the day before doesn't tell the same story as one 30 minutes before the first serve.
A real case. Jurij Rodionov v Giovanni Mpetshi Perricard, at the US Open. Mpetshi Perricard's margin-free price first swings between 1.61 and 1.88. It holds steady on the Sunday, then climbs to 2.14 on match day. He starts as favourite and isn't one any more by the first serve. Rodionov's price does the reverse, like a mirror. The chart shows the move. It doesn't say what caused it.
From 29 August to the start, the margin-free odds on “Giovanni Mpetshi Perricard win” moved from 1.61 to 2.14 (+33.19%), a margin-free probability of 62.15% then 46.66%. Lowest value seen: 1.61; highest: 2.14. This chart describes a past market movement: it says nothing about the match result and is not betting advice.
| Outcome | First tracked odds | Last odds before the start | Change | Margin-free probability (first, then last) |
|---|---|---|---|---|
| Jurij Rodionov win | 2.64 | 1.88 | −29.06% | 37.84% then 53.33% |
| Giovanni Mpetshi Perricard win | 1.61 | 2.14 | +33.19% | 62.15% then 46.66% |
Source: OddScore. Margin-free odds computed from the odds of the international reference bookmakers, snapshots from 29 August to 31 August 2026, match already played. Data frozen on 11 October 2026.
On this chart, the gap between the two lines reads at a glance. With only 2 outcomes, the moment they cross is the moment the market switches favourites. I'd say that crossing is the cleanest thing a two-outcome market can show.
The events we track
OddScore covers the Grand Slam (Australian Open, Roland-Garros, Wimbledon, US Open) for men and women alike. On top of that come the Masters 1000 and ATP 500 on the ATP side, and the WTA 1000 and WTA 500 on the WTA side.
Only singles are covered, and only the main draw. Qualifying and doubles aren't tracked for now.
Not a tennis tipster site
OddScore doesn't give you betting advice, in tennis or in football. What you get is a read of the market: odds movements, real probabilities, bookmaker signals. The AI reading sums up what the market is saying before the match. It isn't a bet to follow, and nothing in it guarantees a winner.
Remember: OddScore doesn't hand you a bet to copy. It helps you understand what the market is saying.
See also: how it works · football odds · basketball odds · American football odds · ice hockey odds · baseball odds · the tennis page
Put it into practice
Apply this guide to real odds.
See a market reading
A real match with its odds, movements and 0-100 signal.
Open the demoMargin calculator
Measure a bookmaker's margin on any market.
Calculate the marginDig into the market
Odds movements are only part of the story. Here are the next topics to read.
Understanding odds movements
Why a price shortens or drifts, and what that can tell you about the market.
Read the guideWhy odds change
Injuries, the money coming in, bookmaker tweaks: what makes the odds move.
UnderstandMarket signals
How to tell everyday market noise from a move that's worth a closer look.
ExploreTennis predictions: how to analyse a match
Surface, current form and head-to-head records. A way to break a match down.
Read the guideFrequently asked questions
Which tennis market does OddScore analyse?
Just one: the match winner. A tennis match can't end in a draw. So the market only has 2 outcomes, a win for Player 1 or a win for Player 2.
Why is there no over/under market for tennis?
Some bookmakers offer an over/under on total games. But too few of them cover it to build a reliable signal. OddScore would rather stick to a well-covered winner market than show a shaky signal on a thin one.
Which tennis competitions does OddScore track?
The Grand Slam (Australian Open, Roland-Garros, Wimbledon, US Open) for both men and women. Then the Masters 1000 and ATP 500 on the ATP side, and the WTA 1000 and WTA 500 on the WTA side. Singles only, main draw. No qualifying, no doubles.
Why 2 outcomes in tennis and 3 in football?
Because a tennis match goes on until someone wins. A football match can finish level. That's the only real difference between the two sports when the signal is calculated.
Does OddScore give tennis tips?
No. OddScore doesn't give betting advice, in tennis or anywhere else. The AI reading sums up what the market is saying before the match. It isn't a bet to follow.
Sources & methodology
This page covers the tennis market OddScore tracks: the match winner, its 2 outcomes and the events included. The method itself (odds movements, real probabilities, 0-100 signal) is on the How it works page, shared across every sport. For the rules and player support in Great Britain, see the Gambling Commission and BeGambleAware. The ITIA is the body responsible for integrity in professional tennis.
- Track the winner market (P1/P2) across several bookmakers.
- Convert the odds into real probabilities to strip out the bookmaker's margin.
- Turn that into a simple 0 to 100 signal, alongside an AI reading.