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

Karolina Pliskova of the Czech Republic serves 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)