Zheng: "I'm really sorry

Appearing very tense during her Masters pool match against Elena Rybakina, Qinwen Zheng lost her composure somewhat.

Annoyed, the Chinese player attacked a few spectators, shouting in their faces.

After finally coming through in three sets (7-6, 3-6, 6-1), the Olympic medallist apologized in a press conference.

She declared: "I apologize, because at one point I wasn't totally in control. I'm really sorry I shouted.

I'd like to thank the fans for continuing to support me. I'm really happy to win this match. I'd never beaten her before.

She's one of the best players on the circuit right now. She has a great serve and excellent shots.

I'm glad I gave it my best shot."