Australian Open Semis clash - Collins v Kvitova, look at previous records

A look at the records of Czech Republic's Petra Kvitova and American Danielle Collins before their semi-final match at the Australian Open on Thursday (prefix number denotes seeding):

8-PETRA KVITOVA - Age: 28 WTA Ranking: 6

Grand Slam titles: 2 (Wimbledon 2011, 2014) 2018 Australian Open performance: First round

Best Australian Open performance: Semi-finals (2012, 2019) It is the first time Kvitova has reached a Grand Slam semi-final since being stabbed in a home invasion in late 2016, requiring surgery to her left hand.

The Czech power-hitter has started the new year with a bang, winning the Sydney International title followed by five wins at Melbourne Park without dropping a set.

DANIELLE COLLINS Age: 25 WTA Ranking: 35

Grand Slam titles: 0 2018 Australian Open performance: Did not play

Best Australian Open performance: Semi-finals (2019) Collins was ranked 162nd a year ago, before she recorded wins over Madison Keys on her way to the Indian Wells quarter-finals, CoCo Vandeweghe and Venus Williams during a Miami semi-final run and Victoria Azarenka en route to another semi-final in San Jose.

The American had not recorded a match win at Grand Slams until this year but now has five of them. She knocked out three seeded players, including world number two Angelique Kerber. HEAD-TO-HEAD (Kvitova 1 - Collins 0)

2019 Kvitova d Collins 6-7(6) 7-6(6) 6-3 (Brisbane, hard)