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

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