Belinda Bencic advanced to the semifinals in just her second Grand Slam since since returning from maternity leave, upsetting Mirra Andreeva through a pair of tiebreaks Wednesday at Wimbledon.

Mirra Andreeva secured one of the biggest wins of her young tennis career Monday at Wimbledon – but for a few moments after match point, she had no idea.

Belinda Bencic, playing in her first Wimbledon quarterfinal in nine appearances at the All England Club, upset Russian teen sensation Mirra Andreeva 7-6 (3), 7-6 (2) on Wednesday to reach her second Grand Slam semifinal and first in six years.