Bencic backed up her big upset over No.8 seed Aryna Sabalenka with an even bigger stunner over former World No.1 Simona Halep earlier in the day, defeating the Romanian 4-6, 6-4, 6-2. "Today I didn't really feel in a match mood, I don't know why".
Kvitova will next play Viktoria Kuzmova, who rallied to overcome Sofia Kenin, 1-6, 7-5, 6-2.
Chance to make the fight against Tsurenko was at the end of the second set, but with the score 5:4 Ukrainian failed to apply for a set.
Following a fourth-round run at the Australian Open, two Fed Cup wins, and her runner-up finish in Doha last week, Halep has played a lot of matches in recent weeks, so her reluctance to play a three-setter was understandable.
The challenger took a fall late in the opening set, potentially rolling her ankle while also hitting her shoulder.
"This match is the result of that", Osaka told reporters of her coaching shake-up. Alison Risk of the United States also advanced with a 6-2, 6-3 win over France's Alizé Cornet 6-2, 6-3.
In the third round, Svitolina just 1 hour and 2 minutes defeated the ex-first racket of the world Garbinie the Wind. "You just have to find a way to, like, win no matter what the situation is", Osaka said.
At least 70 dead in Bangladesh building fire
In this Wednesday, Feb. 20, 2019, photo, firefighters and local people help douse a fire in Dhaka, Bangladesh. At least 70 people are dead and dozens more are injured following a warehouse fire in Bangladesh.
"I don't think I necessarily understand what position I'm in in a way", Osaka said of her struggle to come to terms with the fact that she is one of the highest profile stars in tennis right now.
"I was playing my best tennis and I was handling the first set pretty good but then it is frustrating to have this kind of injury".
Osaka is guaranteed to hold on to the world number-one spot this week but Petra Kvitova, Simona Halep and Karolina Pliskova can all close the gap. "I tried to finish the points faster because I'm a little bit exhausted", Halep said.
Hsieh came from a set down to beat the Wimbledon champion 5-7 6-4 6-0, her first win over the German in three attempts.
"I think they both looked little bit exhausted", Svitolina said of the Halep-Bencic quarterfinal.
"It's a little bit hard because I feel like people are staring at me, and not like in a good way".
"For me, I just want to have the mentality of not thinking so much who is in the other side of the net", the 24-year-old said.