It was a tough day at the office for Barty, who has a shot at revenge in the next round against a two-time grand slam champion.
The former world No.1 and her mentor believes a decision made earlier this month was a blessing in disguise.
Serena Williams suffered a shock third-round exit at the 2020 Australian Open. She lost a tight three-set match to Wang Qiang.
Petra Kvitová grinded past Paula Badosa to reach the last 32 at the Australian Open.
It was a day of mixed emotions for the stars of the women's tour on Tuesday.
Belinda Bencic withstood a second-set fightback from Petra Kvitova to earn a vital win that keeps her in the running at the 2019 WTA Finals.
The top eight women in the world are all present for this event’s debut in Shenzhen, with significantly increased prize money.
Petra Kvitová has praised a 'difficult' draw in Shenzhen as she begins her campaign on Sunday against Naomi Osaka.
Petra Kvitova remained positive about her 2019 grand slam season after exiting the US Open at the second round stage.
Petra Kvitová has withdrawn from next week's tournament in Toronto due to a forearm injury.
Johanna Konta earned her second top-ten win in a row by beating Petra Kvitova to advance to the Wimbledon quarter-finals.
Petra Kvitová's bid for a third Wimbledon title continues after a straight sets win over Kristina Mladenovic to reach the third round.
Petra Kvitová will make a decision on her participation at Wimbledon later this week as the third grand slam of the year approaches.
French Open champion Ashleigh Barty and World No.3 Karolina Pliskova are the favourites for the title after Kvitova was forced to withdraw.
Petra Kvitova is still hopeful of playing at Wimbledon after withdrawing from next week's Nature Valley Classic in Birmingham.
The Czech sixth seed was tipped as one of the favourites to win the title at Roland Garros.
Ubitennis' guide to the five women who could exit the French Open as world No.1.
Petra Kvitova was too good for Caroline Garcia as she booked her place into the quarter-finals in Madrid.
Petra Kvitova is looking to be the first WTA player to win a single Premier Mandatory four times in Madrid this week.
Naomi Osaka battled back from a seemingly impossible position in the decider to edge out Donna Vekic and reach the semi-finals in Stuttgart.