Osaka defeats Muchova to reach a U.S. Open semifinal after 5 years

Naomi Osaka returned to the U.S. Open semi-finals on Wednesday (September 3, 2025) with a 6-4 7-6(3) win over Karolina Muchova, as the four-times Grand Slam champion delivered a battling display to underline her resurgence on the sport’s biggest stage.

Four years after winning the last of her four major titles, the Japanese 23rd seed, who returned last season after a lengthy maternity break, stretched her unbeaten run in major quarter-finals to 5-0 and booked a clash with Amanda Anisimova.

“It means so much. I’m surprised I’m not crying,” said Osaka, who only two years ago was watching the semi-finals from the stands at Arthur Ashe Stadium.

“I was sitting up there watching and hoping I would have an opportunity to play on this court again, so my dreams are coming true … There’s been so much hard work you guys haven’t seen.

“I’m just grateful to my team. Hopefully you guys will come and watch my next round.”

Muchova, who had been on court for more than 10 hours over four draining rounds, took treatment in the locker room for an apparent left leg issue after she dropped a tight opening set, but came out firing to break at the start of the next.

She struggled to move at times with heavy strapping on her thigh but continued to frustrate her opponent with her inventive brand of tennis to break for a 5-4 lead, only for Osaka to wrest back the initiative and go through after the tiebreak.

“It was an incredibly difficult match,” Osaka added.

“She is one of the best players in the world. Every time I play against her it’s so difficult.

“Last year she beat me when I had one of my best outfits. I was really upset. I’m just grateful to be here.”