Venus Williams overcame French Open champion, Jelena Ostapenko in a gruelling three hours and 13 minutes to claim her first win at this year’s WTA Finals in Singapore.
The match lasted three hours and 13 minutes – the third-longest in Singapore history
The American, 37, won 7-5 6-7 (3-7) 7-5 in her second round-robin match in the White Group, having lost her opener against Karolina Pliskova on Sunday.
The Czech qualifies for the semis with a win, Muguruza with a two-set victory.
Williams managed 11 of 20 breaks of serve in a match that finished just one minute short of the record at the Singapore Indoor Stadium.
The American, twice a Grand Slam finalist in 2017, missed a match point in the second set but came out on top in the 69-minute third set, which included six consecutive breaks.