De Minaur advances after Mensik retires, Andreeva reaches last 16 at China Open

BEIJING, Sept. 29 (Xinhua) -- Third seed Alex de Minaur of Australia advanced to the semifinals of the China Open after his opponent Jakub Mensik of the Czech Republic retired while trailing 4-1 in the opening set on Monday.

De Minaur broke twice in the third and fifth games to take control before the 20-year-old Czech pulled out. The Australian had also won all three of their previous encounters.

Mensik,