Gael Monfils and Elina Svitolina, two of the most accomplished players in tennis and one of the sport’s most prominent married couples, have taken out both of the world No. 4s on the same day, at the same event, in the same round—even on the same court. They both came back from a set down to do it, too.

Elina Svitolina has rallied from two breaks down in the first set and taken 11 of the next 12 games in a 6-4, 6-1 victory over Veronika Kudermetova to reach the Australian Open quarterfinals for the t