The Delaware native suffered from an arm injury that comes from a vein condidtion.
The action continues on Day 2 of the 2016 U.S. Open and we've got you covered with live updates, notes and quotes on the live blog
"I really believed I was going to win it," said Isner.
The magical, mystical monfils clocked out--literally--on Day 1 in New York.
The American takes a stand against a man who was taking a stand...
Frances Tiafoe missed an opportunity to bag a huge win in New York, but John Isner says he's going to be a good one.
The two-time U.S. Open champion has very high standards.