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 reached a first Wimbledon semi-final as she beat Mirra Andreeva in straight sets on Centre Court. Seventh seed Andreeva had been the firm favourite, with the 18-year-old up to this point not dropping a set on her impressive run to the quarter-finals.