Coco Gauff says online racist abuse during China Open was ‘draining’ after loss to Mertens

• American involved in disputed point during tournament

• Gauff called out insane' amount of abuse online

Coco Gauff said she had been left drained by the racist abuse she experienced during the China Open after losing in the last 16 to Elise Mertens.

The American was dismayed earlier this week after an incident during her match against Chinese teenager Sun Xinran. The 16-year-old thought she had hit a winner late in the first set but Gauff had raised her hand to stop the point because she was distracted by flickering lights on the stadium's advertising hoardings. The move prompted some boos from the crowd. The umpire agreed to have the point replayed, and Gauff went on to win 7-5, 6-1.