Spain's Muguruza did not take the court yesterday after her semi-final opponent, No. 2 seed Simona Halep pulled out of the tournament citing a foot injury after winning her quarter-final match on Friday.
Kvitova gave the first break to 4-2 after a surprisingly error-prone game but she was ready to grab it back with a series of blistering forehand winners.
Caroline Wozniacki accused Monica Niculescu of cheating during their third-round clash at the Qatar Open and the war of words continued after the match.
Making fifth appearance at Qatar Total Open, in her first semifinal here, Kvitova maintained, with previous defeat of No.3 Svitolina in 3r and No.9 Kerber, her ideal record against top 10 opponents in 2018 and clinched the fifth career win in nine meetings against a reigning No.1, the second against the Dane (2011 WTA Finals the former). The Spaniard also had to go the distance coming from a set down to deny Caroline Garcia 3-6, 6-1, 6-4.
The umpire said he thought everything was "regular", but Wozniacki added: "It's the only way she can win."She then mimicked the grunts.Afterwards she complained that her opponent was "a player that tries to get into your head". She tried to irritate me, I made some dumb mistakes.
The injury to her right foot had forced her out of the game since the Australian Open.
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Striker Anthony Martial was also involved in a dressing-room bust-up after a poor display in the 2-0 defeat at Spurs. If not, he might find himself on the substitutes bench more often than he would like.
Kvitova also trailed 3-1 in the second-set tie-break, but showed great resilience and produced some majestic winners to frustrate the top seed and broke twice in the final set to stay in the hunt for a second title of the year.
"She has a hard game to play against when she's on, but as well when she isn't, because you don't get any rhythm and you know that eventually she's going to start hitting those balls in and you need to be ready for it", she said. Kvitova though said that would not be an advantage.
Asked about keeping her place at the top of the world rankings, she replied: "It feels good, but honestly I'm just happy to have won today". Doha would have been Wozniacki's third final this season, after Auckland and the Australian Open.
"I think we played both really well and I can take a lot out of that", the Dane said.
"I think it's definitely a milestone". "She played aggressively and I made a few unforced errors and I felt that was frustrating because I had my opportunities there".