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.

Mirra Andreeva was the last person on Centre Court to realize she beat Emma Navarro, a result that made her the youngest woman in 18 years to reach the Wimbledon quarterfinals.

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,