World number two Naomi Osaka's 23-match winning run came to an abrupt end as she lost 6-0 6-4 to Maria Sakkari in the Miami Open quarter-finals.
Osaka, 23, hid under a towel as she tried to compose herself and fought back to lead 3-0 in the second set.
But Sakkari, from 4-1 down, broke twice to win five games in a row for victory.
Sakkari, 25, celebrated with a loud roar as she earned the biggest win of her career, triumphantly hugging her team after beating a player ranked in the world's top three for the first time.