In pics: WTA Shenzhen Open tennis tournament

Maria Sharapova of Russia returns the ball during the second round match against Alison Riske of the United States at the WTA Shenzhen Open tennis tournament in Shenzhen, south China's Guangdong Province, Jan. 2, 2018. Sharapova won the match by 2-1. (Xinhua/Mao Siqian)