Wimbledon marathon man John Isner was forced to retire after two games of his second round match against Frenchman Adrian Mannarino with a knee injury on Wednesday.
A summary of the action on Day 3 at the US Open.
World No 1 Serena Williams kept her Wimbledon title defence on track on Sunday, downing Germany's Annika Beck 6-3, 6-0 with a crushing display of power and booming serves.