Naomi Osaka defeats Kateřina Siniaková in second round at U.S. Open

Naomi Osaka advanced to the next round of the 2026 U.S. Open after defeating Kateřina Siniaková in New York City on Thursday. The four-time Grand Slam champion competed in a daytime session at Arthur Ashe Stadium. During the match, Osaka wore a custom Thom Browne walk-on look that featured a netted jacket with gray stripes and small tennis racket embellishments. This ensemble preceded her Nike tennis kit, which drew design inspiration from basketball jerseys. The victory follows her debut appearance earlier in the week, where she wore a customized Who Decides War outfit styled as a tribute to Allen Iverson. The 2026 U.S. Open tournament continues through Sept. 13.

• 6:32 PMYahoo Sports — Naomi Osaka Elevates Tennis Whites in Thom Browne at the U.S. Open