
Karolina Pliskova continued her dominance of Garbine Muguruza on Wednesday, opening her WTA Finals campaign with a battling 4-6, 6-2, 7-6 (8/6) victory over the Spaniard.
Czech third seed Pliskova, at 29 the oldest player in this year's edition of the elite season-ending event, has now won nine of 11 career meetings with Muguruza, the latest putting her atop her round-robin's group standings alongside Estonian Anett Kontaveit, who beat second-seeded Czech Barbora Krejcikova 6-3, 6-4.
After dropping the first set, Pliskova produced a superb serving effort to take the second, putting 16 of 18 first serves in play and dropping just two points on serve.
In a tense third set, Muguruza saved two match points while serving at 4-5 - the first with a service winner.
But she was unable to capitalize on two break points that followed as they went to the tiebreaker.
Muguruza saved another match point to knot the decider at 6-6, but Pliskova won the next two to polish it off after two hours and 26 minutes when Muguruza belted a forehand wide.
The tournament was moved to Mexico from its usual home in Shenzhen, China, due to the coronavirus pandemic.
The switch in venue means the tournament's eight-strong singles field must adjust to the thin air of Guadalajara, which is around 5 100 feet (1 550 meters) above sea level.
Magic in Mexico! ?????
— wta (@WTA) November 11, 2021
???? @KaPliskova battles past Muguruza in a three set thriller! Incredible performance from both women! ??#AKRONWTAFinals pic.twitter.com/ZbXTCN7wpa
Red-hot Kontaveit kicked off group stage action with her straight-sets win over French Open champion Krejcikova.
Estonia's Kontaveit, the last player to secure her spot in the event, notched her 11th straight match victory, continuing a superb season that has seen her capture four WTA titles and rise to eighth in the world.
She needed just half an hour to pocket the first set - sealing it with an ace.
Kontaveit, who didn't face a break point, secured the match when Krejcikova fired a backhand into the net on match point.
"I'm definitely very thrilled to get the win, it was a very tough match," Kontaveit said. "I think I managed to win a lot of points on my first serves once they actually went in."
Krejcikova, the only reigning Grand Slam champion in the field, remained optimistic after a "difficult" match, noting that the round-robin format was more forgiving than a traditional tournament - and she has doubles to contest as well.
"I'm going to have another five matches that I can play, so I'm looking forward to that," she said.
Anett Kontaveit gets the first @WTAFinals win! ?#AKRONWTAFinals pic.twitter.com/jrZjmIkxpz
— wta (@WTA) November 10, 2021
Round-robin
Anett Kontaveit (EST x8) bt Barbora Krejcikova (CZE x2) 6-3, 6-4
Karolina Pliskova (CZE x3) bt Garbine Muguruza (ESP x6) 4-6, 6-2, 7-6 (8/6)