World number one and two players, Naomi Osaka and Simona Halep, have been knocked out in the fourth round of Indian Wells in California, United States.
Osaka’s defence of her title ended after defeat to Belinda Bencic.
The Japanese star, who holds the US and Australian Open titles, was beaten 6-3 6-1 by the Swiss world number 23 in just over an hour.
Romania’s Halep was also beaten 6-2 3-6 6-2 by Czech teenager, Marketa Vondrousova. It was the 19-year-old’s first win over a top-five player.
Halep’s defeat means that Osaka, who claimed her first WTA title with victory at Indian Wells last year, will retain her number one ranking, despite losing to Bencic.
“I didn’t play that well,” Osaka said.
“Honestly, at a time like this with that scoreline, I would usually feel very depressed and sad.
“But I feel pretty good right now because I tried my best and I don’t really have any regrets.
“She was just playing so well. There wasn’t anything that I could do in that situation.”
Bencic, who beat four top-10 players on the way to winning a title in Dubai last month, will face world number five, Karolina Pliskova, who beat Anett Kontaveit 7-6 (7-0) 4-6 6-2, in the quarter-finals.
“I’m very confident with my game right now. I’m hitting the ball well. So just things worked out for me,” Bencic stated after her victory.
Vondrousova, Halep’s conqueror, had defeated 2017 French Open champion, Jelena Ostapenko, and last year’s Indian Wells finalist, Daria Kasatkina, prior to beating her opponent.
“I was running a lot – I felt like I was dying for a moment,” Vondrousova joked in an on-court interview.
“I’m so happy to be through and so happy with my play,” she noted.
She will play Ukraine’s Elina Svitolina, who beat Australian Ashleigh Barty 7-6 (10-8) 5-7 6-4, in the next round.