Tennis predictions 18 September 2026
AI tennis predictions for every singles match: who wins, the most likely set score and the chance of a deciding set, from player ratings built on 57,590 matches.
10Matches
3Tournaments
6Forecast
9,192Players rated
Strongest calls of the day
23:00GuadalajaraR28Cristina Bucsa0Iva Jović20–2AI prediction22%High confidence78%ForecastJović to win78%Full analysis 16:00WTA Sao Paulo, Brazil Women, SinglesR27Teodora Kostović0Kaitlin Quevedo20–2AI prediction28%High confidence72%ForecastQuevedo to win72%Full analysis 20:30WTA Sao Paulo, Brazil Women, SinglesR27Mary Stoiana0Paula Badosa20–2AI prediction32%Medium confidence68%ForecastBadosa to win68%Full analysis
All matches by tournament
WTA Guadalajara
02:40Peyton StearnsSloane Stephens
762
640
Stearns60%2–0›21:00Gleason Q / Piter KKobori M / Plipuech P
23:00Cristina BucsaIva Jović6341
46102
Doubles410
662
Jović78%0–2›WTA WTA Sao Paulo, Brazil Women, Singles
16:00Teodora KostovićKaitlin Quevedo
340
662
Quevedo72%0–2›17:55Anna BlinkovaAlina Charaeva672
450
Blinkova51%2–0›20:30Mary StoianaPaula Badosa420
662
Badosa68%0–2›22:20Nadia PodoroskaSuzan Lamens7362
6631
Lamens51%0–2›WTA WTA Sao Paulo, Brazil Women Doubles
17:00Barros V L / Leme Da Silva N VStrakhova V / Tikhonova A
250
672
Doubles19:00Dabrowski G / Stefani LQuevedo K / Salkova D
–
–
Doubles23:40Stoiana M / Valdmannova VDang Y / You X
6371
46102
Doubles
How these predictions are made
Every player carries a rating that moves after each match by how surprising the result was — beating a stronger opponent is worth more than beating a weaker one, and a win in an ATP or WTA draw counts for more than one in an ITF event. The win probability comes from the gap between two ratings, adjusted by their head-to-head record. The set score follows from that probability rather than being guessed separately. Where a player has played too few matches, or has never played at tour level, the rating is pulled back towards the average and the match is marked as thin data instead of being dressed up as a confident call. Doubles are excluded: the rating measures singles.
Every player carries a rating that moves after each match by how surprising the result was — beating a stronger opponent is worth more than beating a weaker one, and a win in an ATP or WTA draw counts for more than one in an ITF event. The win probability comes from the gap between two ratings, adjusted by their head-to-head record. The set score follows from that probability rather than being guessed separately. Where a player has played too few matches, or has never played at tour level, the rating is pulled back towards the average and the match is marked as thin data instead of being dressed up as a confident call. Doubles are excluded: the rating measures singles.