Simona Halep, the top seed and French Open favorite, was stunned by unseeded Iga Swiatek of Poland in the fourth round on Sunday.
Swiatek, 19, prevailed 6-1, 6-2, earning her first win over a top-15 player and ending Halep’s 17-match win streak dating to February.
Halep played better than the score suggests, committing just 15 unforced errors. But Swiatek had 30 winners to 20 unforced errors.
Swiatek is ranked 54th in the world and into a Grand Slam quarterfinal for the first time. She next gets fifth seed Kiki Bertens of the Netherlands or Italian qualifier Martina Trevisan.