Stan Wawrinka needed to win a pair of tie-breaks to beat Karen Khachanov in their round-of-16 match at the St Petersburg Open.
Defending champion Peter Gojowczyk rallied from a set down to defeat Jo-Wilfried Tsonga 6-7 (5-7) 6-3 6-4 at the Moselle Open.
After falling a break down in the first set, Pauline Parmentier recovered to defeat Jessica Pegula in the Coupe Banque Nationale final.
Jelena Ostapenko stunned to claim French Open title just two days after 20th birthday.
At 20, Jelena Ostapenko becomes Latvia's first Grand Slam champion and youngest in the sport since 2004 with French Open title.
A vibrant Simona Halep stands on the brink of a first grand slam title after defeating the powerful Karolina Pliskova.
Both Jelena Ostapenko and Timea Bacsinszky marked their birthdays on Thursday, but it was the Latvian who had extra cause for celebration.
A remarkable second-set turnaround paved the way for Simona Halep to reach the last four of the French Open on Wednesday.