Iga Swiatek stretches to return a shot from Camila Osorio before the latter's retirement in China. (AP PHOTO)Iga Swiatek stretches to return a shot from Camila Osorio before the latter's retirement in China. (AP PHOTO) Credit: AAPWimbledon champion Iga Swiatek has defeated Camila Osorio for her 400th career win to advance to the fourth round at the China Open. Swiatek dismantled her Colombian opponent 6-0 in the first set, before Osorio retired from the match in the opening game of the second. "For sure, I'm sorry for Camila, because she's always giving her 100 per cent," Swiatek said.