Dominic Thiem of Austria celebrates after defeating Stefanos Tsitsipas of Greece in the men's final at the China Open tennis tournament in Beijing

Stefanos Tsitsipas of Greece hits a return shot while competing against Dominic Thiem of Austria in the men's final at the China Open tennis tournament in Beijing

Naomi Osaka of Japan, left, and Ashleigh Barty of Australia pose with their trophies after the final of the women's singles final at the China Open tennis tournament in Beijing. Os...

Sofia Kenin, left, and Bethanie Mattek-Sands of the United States hold the first-place trophy after beating Jelena Ostapenko of Latvia and Dayana Yastremska of Ukraine in the women...

Dominic Thiem of Austria prepares to hit a return shot against Karen Khachanov of Russia during the men's semifinals match in the China Open tennis tournament in Beijing

Dominic Thiem of Austria reacts after beating Andy Murray of Britain in their quarterfinal match in the China Open tennis tournament in Beijing