Top seed Iga Swiatek fought back from dropping her first set in 10 matches to beat China's Zheng Qinwen and reach the French Open quarter-finals.
Swiatek, who turns 21 on Tuesday, celebrated by earning a 6-7 (5-7) 6-0 6-2 win over world number 74 Zheng.
Zheng fought off five set points to win an absorbing opener, then was hampered by a thigh injury from the second set.
Poland's Swiatek extended her winning streak to 32 matches and now faces 11th seed Jessica Pegula.
Pegula also produced a comeback to beat Romania's Irina-Camelia Begu 4-6 6-2 6-3 in her fourth-round match earlier on Monday.