Australia's Ash Barty will remain the world's top-ranked player after Naomi Osaka's shock trouncing by Maria Sakkari at the Miami Open.
As Osaka's 23-match winning streak neared an end Wednesday, she paused before serving to crane her neck and study the sky, as if seeking intervention from above.
Then she carried on, and so did Sakkari, the Greek sealing a dominant 6-0 6-4 win to advance to the last four.
"The more stuff like this happens, the more I'll learn from it," world No.2 Osaka said.
The defeat was her first since February 2020, and it ended any chance of reclaiming the No. 1 ranking this week from Barty, who is in the semi-finals in defence of the title she won in 2019.
Barty's reign as the game's best is guaranteed for at least another five weeks, which would take her to a total of 74 weeks.
While much of that time was spent sitting at home while COVID-19 suspended the tour, Barty will move to ninth all-time for most weeks at the top.
Osaka won her fourth grand slam title at the Australian Open in February, but in five Miami appearances she has never advanced beyond the last eight.
She said couldn't get comfortable on the tournament's hard-court surface.
"I felt like I haven't been playing well this whole tournament, like I couldn't find a groove," she said.
Against Sakkari, the only Greek woman ranked in the top 250, Osaka lost 15 consecutive points on her serve to fall behind and blew a 4-1 lead in the second set.
She faced a break point on seven of her eight service games.
"Today's service problems kind of came out of nowhere," Osaka said.
Sakkari earned her sixth career win over a top-five opponent - making the most of her close call in the previous round against Jessica Pegula in which she saved six match points.
While Barty will face Elina Svitolina in the Miami semi-finals and Sakkari battles Bianca Andreescu for a spot in the decider, Osaka turns her attentions to the clay-court swing of the WTA season.
"I feel like no matter what I'll have more freedom on the clay courts and the grass than on hard, because I feel like I'm still learning a lot on those surfaces," Osaka said.