The 17th seed has been in no-nonsense mood so far in Melbourne, moving through the rounds with the minimum of fanfare, but faces her biggest test against the German.
The Slovakian eventually won 6-4, 6-1 but the match will be remembered for a ludicrous umpiring decision at a crucial stage of a tight opening set.
Australian Nick Kyrgios blasted 15 aces to blow past Japan's Yoshihito Nishioka 6-2, 7-5 on Thursday and reach the quarter-finals at the Citi Open in Washington.
India will begin their campaign by locking horns with China on Tuesday. Ankita has been in tremendous form since the start of the season, winning two ITF singles and as many doubles titles.
Images from Day 3 of the French Open matches played at Roland Garros in Paris on Tuesday
From potential dark horses to former champions, here are the players who were knocked out of the Australian Open on Thursday
Saketh Myneni got himself in line for two gold medals by reaching the finals of both men's doubles and mixed doubles events even as other Indian tennis players, including Sania Mirza, clinched three bronze at the Asian Games in Incheon on Sunday.
Images from Day 6 of the Australian Open in Melbourne on Saturday.
Defending champion Stan Wawrinka avoided a repeat on Wednesday of his first-round scare, though he was still made to work hard in a straight-sets win over Japan's Taro Daniel. The Swiss third seed won 7-6(7) 6-3 6-4 and is now on a six-match winning streak on clay, having warmed-up for Roland Garros by winning the title in Geneva last week. Progress was by no means straightforward against a skilful opponent ranked 93rd in the world and Wawrinka has yet to switch to his A game. But he says it's there when he needs it. "If you look at the first two matches, for sure I'm not playing my best tennis, but I know I have my best tennis in me," the 31-year-old Wawrinka, playing in his 45th consecutive grand slam tournament, told reporters.
Images from Day 3 of the Australian Open in Melbourne on Wednesday.
Roger Federer rallied from a set down to beat Moldovan surprise package Radu Albot 4-6, 7-5, 6-3 in a stuttering start to the 20-times Grand Slam champion's Miami Open campaign on Saturday.
Images from Day 3 of the 2016 Australian Open in Melbourne, on Wednesday
IMAGES from Day 7 at Wimbledon on Monday
IMAGES from Day 6 at Wimbledon on Saturday.
Images from Sunday's action at the Australian Open.
Making their first appearance in the WTA Finals in Singapore, Sania Mirza and Cara Black outplayed Raquel Kops-Jones and Abigail Spears in their opening match to book their semi-finals berth on Thursday.