No. 2 Rafael Nadal is one set away from his first loss at Wimbledon since 2007.
The 2008 Wimbledon champion lost the second set to young Dutchman Robin Haase 6-3, by one break.
Haase gained the edge in the third frame with an incredible running forehand on break point in the sixth game of the set.
Could Isner-Mahut actually wind up not being the biggest headline of the day?