2018 WTA Qatar Open: Catherine Bellis beats Karolina Pliskova at single's third round match

Karolina Pliskova of the Czech Republic hits a return during the single's third round match against Catherine Bellis of the U.S. at the 2018 WTA Qatar Open in Doha, Qatar, on Feb. 15, 2018. Catherine Bellis won 2-0. (Xinhua/Nikku)