Media playback is not supported on this device Muguruza ‘did not realise’ she’d won the WTA Finals
Spain’s Garbiñe Muguruza beat Karolina Pliskova 4-6 6-4 6-4 to claim the US Open title.
The Wimbledon champion achieved her first victory at the year-end world number one tournament in a bruising encounter in New York.
Muguruza, 24, is the first Spaniard to win the US Open since Conchita Martinez in 1994.
Pliskova beat Muguruza in a nail-biting final set at the Australian Open in January.
The Czech, 24, led 4-2 in the decider in Melbourne but was stunned by her compatriot in the opening games of this contest.
Muguruza served for the match on four occasions before Pliskova came back each time.
Pliskova, who endured a difficult year after winning the title at Flushing Meadows in 2016, broke in the sixth game of the final set to get back to 4-3 and hold serve before recovering to level at one set all.
Muguruza needed a marathon game to hold serve at 3-3 in the final set to give herself a sniff of glory as Pliskova had served out the match in two hours 10 minutes.
Muguruza broke in the sixth game of the third set and then again in the 11th to surge clear and clinch her first title of the year.