Naomi Osaka def. Katerina Siniakova 6-2, 5-7, 6-1 — US Open 2026 R64

Match recap

Naomi Osaka defeated Katerina Siniakova 6-2, 5-7, 6-1 in the R64 of the US Open 2026.

Twenty unforced errors and a lead surrendered from 5-3 in the second set had Osaka a set from the exit, the 13th seed broken in game 9 for 4-5, again in game 11 for 6-5 and once more in game 12. The third set ran the other way entirely: a break in game 2 for 2-0, another in game 6 for 5-1, and 86 percent of first-serve points won against 43 for Siniakova, who managed four winners to Osaka's 11. Two hours and two minutes after a first round that needed two tiebreaks, Osaka is into the third round at the US Open.

Match stats

Naomi Osaka: 11 aces, 31 winners, 43% first serves, 5 double faults, 6/10 break points. Katerina Siniakova: 3 aces, 23 winners, 60% first serves, 7 double faults, 3/8 break points.

Profiles: Naomi Osaka · Katerina Siniakova — US Open 2026

Head-to-head

Naomi Osaka and Katerina Siniakova have met 2 times, with Naomi Osaka leading the head-to-head 2–0.

• Wimbledon 2025 R64 — Naomi Osaka won 6-3, 6-2