After falling behind 3-2 in the opening set, Kvitova showed her quality to reel off four games in a row to move ahead - albeit after saving five break points in the ninth.
Also, Japanese qualifier Yoshihito Nishioka upset sixth-seeded Denis Shapovalov 7-6 (5), 3-6, 7-5, and Albert Ramos-Vinolas beat Viktor Troicki 7-6 (4), 4-6, 7-6 (3).
WUHAN, Sept 28 ― Ashleigh Barty beat Anastasia Pavlyuchenkova 6-2 5-7 6-4 to reach the semi-finals at the Wuhan Open yesterday, but she was made to work hard for victory after surviving a mid-match scare.
Wozniacki won the first three games of the match but failed to build on that strong start, losing the first set after seeing three set points come in go in a long tie-break.
Chelsea face acid test of title ambitions against Liverpool
After facing Chelsea , Liverpool travel to Napoli in the Champions League on Wednesday before hosting City at Anfield next Sunday. That's an interesting month to be honest, but so far so good and the boys are fully in it and ready to go.
Puig had come from a bagel set down to defeat the Australian Open champion 0-6 6-4 6-4 in the second round at the Miami Open in March and the 24-year-old repeated the dose with a forehand victor to set up a clash against home favourite Wang Qiang, who defeated Daria Gavrilova in straight sets, in an all-unseeded battle.
She was soon rewarded for her aggression though as some courageous visits to the net coupled with 24 winners gave her the first set via a tiebreaker.
Tomic, who had his ranking bottom out at No.243 in May, saved a match point on Wednesday against South African Lloyd Harris in a 7-6 2-6 7-6 win.
But it was a short-lived fightback as Barty, Australia's top-ranked player, quickly regained control while Kerber struggled to contain unforced errors.
Tiger Woods storms into joint-lead at the Tour Championship
Woods was never seriously challenged in the final round after starting with a three-shot lead over Rory McIlroy and Justin Rose . I've had hot weeks and you win, but - you can be in the midst of average play, but this comes through consistency for me.
There is seemingly no place like home for Wang, who needed just 67 minutes to defeat Puig in a match short in duration but full of action.
Kontaveit, who knocked out world number nine and 2017 US Open champion Sloane Stephens in the first round at Wuhan, is aiming to finish the season strongly. I feel like I'm a top-20 player. I feel like I'm a top-20 player.
"It's been a really exciting year and hopefully there is a couple of big tournaments left". Spain's Garbine Muguruza's patchy form this season continued as she was beaten 7-6 (3) 7-6 (1) by Czech qualifier Katerina Siniakova in a tightly-contested clash.
Tiger Woods Has Won His 80th Tour Victory at PGA Tour Championship
The final round of The Open, in which Woods finished tied for sixth, was the event's highest US ratings in 18 years. He now heads to Paris as part of a USA team seeking to win overseas for the first time since 1993.