R64 US Open 2026

Naomi Osaka #13 def. Katerina Siniakova #42

6-2 5-7 6-1

Naomi Osaka defeated Katerina Siniakova 6-2 5-7 6-1 in the 2026 US Open second round on hard courts on September 3, 2026.

Match Information

Match Statistics

StatNaomi OsakaKaterina Siniakova
Aces113
Double faults57
First serve %93.0%91.0%
First serve points won %61.0%51.0%
Second serve points won %57.0%43.0%
Break points saved %62.0%40.0%
Break points converted %60.0%38.0%
Service points won %61.0%50.0%
Return points won %50.0%39.0%
Total points won %56.0%44.0%
Serve rating133108
Return rating11482

Win Probability

How the market's view of each player's chances changed through the match.

Source: Polymarket (opens in a new tab)

Focus the chart and use the left and right arrow keys to inspect probability updates.

Player Comparison

FieldNaomi OsakaKaterina Siniakova
Country JPN CZE
Birth dateOct 16, 1997May 10, 1996
Age2830
Height180 cm174 cm
HandednessRight-HandedRight-Handed
Backhand styleTwo-Handed BackhandTwo-Handed Backhand
Ranking (entering)1342
Ranking points (entering)2,8461,234
Elo (entering)2,0471,827
Current career W-L250–135228–246
Current career earnings$26,612,806$17,388,124
Pre-match H2H

Path

Naomi Osaka's path

OpponentScoreW-LH2HMatch DataDateRound
Anastasia Zakharova #1017-6(6) 7-6(3)WH2HMatch dataSep 1, 2026R128

Naomi Osaka's next match

No later same-event match found for the winner.

Katerina Siniakova's path

OpponentScoreW-LH2HMatch DataDateRound
Elisabetta Cocciaretto #676-3 6-2WH2HMatch dataAug 31, 2026R128