John Isner retired up 5-4 in the first set of his Round of 32 match against David Nalbandian. In the very first point of the ninth game, Isner was shuffling along the baseline to return a volley when he landed awkwardly on his right ankle. Isner immediately dropped his racket to the ground and hobbled over to the bench.
After receiving treatment from the trainer, Isner went out and finished the game but was clearly unable able to move laterally with any speed. Isner attempted to serve in the tenth game but retired after falling behind 0-30.
Isner was scheduled to play a doubles match with partner Sam Querrey against No. 4 seed Mahesh Bhupathi and Max Mirnyi in the last match of the day on Court #3. This match has been cancelled and Bhupathi and Mirnyi will advance in a walkover.