Naomi Osaka was knocked out from the US Open women’s singles third round after losing to 18-year-old Leylah Fernandez at the Arthur Ashe Stadium, on Friday night. Venting her frustration, Osaka smacked her racket, chucked her equipment, sending it bouncing and skidding halfway to the net.

Osaka’s game was off and she had no control over her composure. By the time the match drew to its end, the crowd was booing her for turning her back to the court.

The 18-year-old ended the defending US Open women’s singles champion by registering a 5-7, 6-7 (2), 6-4 win. The Candian, who is ranked 73rd in the world, has never been this far in Grand Slam competition.

Fernandez said: “Right before the match, I knew I was able to win.”

In same fashion, 18-year-old Carlos Alcaraz of Spain toppled French Open runner-up Stefanos Tsitsipas 6-3, 4-6, 7-6 (2), 0-6, 7-6 (5) to become the youngest man into the fourth round at Flushing Meadows since Michael Chang and Pete Sampras in 1989.

In the women’s singles match, Osaka came in with a 16-match winning streak at majors and four career trophies, all on hard courts.

This was Osaka’s first Slam tournament since she pulled out of the French Open before the second round to take a mental health break. She had also give Wimbledon a miss before participating in the Olympics.

Osaka, who was born in Japan and has lived in the US since she was 3, left the court after seven games Friday to change outfits and put on a highlighter-yellow dress. She won 12 of 13 points, including the last nine, with a break at love to go up 6-5.

However, Fernandez had her first break of the match to make it 6-all.

“I guess I wanted to stay on court a little bit longer. And I wanted to put on a show for everybody here. One hour was not enough for me to be on court,” Leylah said.

In the tiebreaker, Osaka fell behind 5-0 in the ensuing tiebreaker. Displaying her frustration, she flung her racket in dismay. While she was not sanctioned for this action, she was later given a warning for hitting a ball into the stands.

“Honestly, I wasn’t focusing on Naomi. I was only focusing on myself and what I needed to do,” the Canadian said.

“I’m going to put on a show like I did tonight. And we’re going to see how it goes,” Leylah said.

(With inputs from Associated Press)