HOW SERENA WILLIAMS AND KAROLINA PLISKOVA MATCH UP AHEAD OF THEIR AUSTRALIAN OPEN QUARTER-FINAL ON WEDNESDAY (PREFIX DENOTES SEEDING): 16-SERENA WILLIAMS (USA) leads 6-KAROLINA PLISKOVA (CZE) 2-1 2018 US Open, hard, quarter-final, Williams, 6-4 6-3 2016 US Open, hard, semi-final, Pliskova, 6-2 7-6 (7-5) 2014 Stanford, R1, hard, Williams, 7-5 6-2 16-SERENA WILLIAMS (USA) Age: 37 Ranking: 16 Plays: right-handed (two-handed backhand) Career prize money: $US88,233,301 ($A126.07 million) Career titles: 72 Grand slam titles: 23 (Australian Open 2003, 2005, 2007, 2009, 2010, 2015, 2017; French Open 2002, 2013, 2015; Wimbledon 2002, 2003, 2009, 2010, 2012, 2015, 2016; US Open 1999, 2002, 2008, 2012, 2013, 2014) Australian Open win-loss record: 85-10 Best Australian Open results: champion 2003, 2005, 2007, 2009, 2010, 2015, 2017 7-KAROLINA PLISKOVA (CZE) Age: 26 Ranking: 8 Plays: right-handed (two-handed backhand) Career prize money: $US$14,563,261 ($A20,356,963 million) Career titles: 12 Grand slam titles: 0 Australian Open win-loss record: 17-6 Best Australian Open results: quarter-finalist 2017, 2018, 2019 Australian Associated Press