Czech Republic's Barbora Strycova hits a return against Czech Republic's Karolina Pliskova during their women's singles fourth round match on day eight of the Australian Open tennis tournament in Melbourne

Romania's Simona Halep plays a backhand return to Japan's Naomi Osaka during their women's singles fourth round match on day eight of the Australian Open tennis tournament in Melbourne

Japan's Naomi Osaka hits a return against Romania's Simona Halep during their women's singles fourth round match on day eight of the Australian Open tennis tournament in Melbourne

Czech Republic's Karolina Pliskova plays a forehand return during her women's singles fourth round match against Czech Republic's Barbora Strycova on day eight of the Australian Open tennis tournament in Melbourne