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.

Djokovic’s bid for an eighth Wimbledon title and 25th Grand Slam singles trophy overall will continue against No. 22 Flavio Cobolli of Italy. Cobolli reached his first major quarterfinal with a 6-4, 6-4, 6-7 (4), 7-6 (3) victory over 2014 U.S. Open champion and two-time major runner-up Marin Cilic.

Mirra Andreeva, an 18-year-old Russian tennis player, became the youngest woman in 18 years to reach the Wimbledon quarterfinals, after defeating Emma Navarro. Despite her win, Andreeva was unaware of her victory at Centre Court,