NEW YORK (AP) - Serena Williams isn't the only Grand Slam champion using profanity at the U.S. Open: Roger Federer let an expletive fly, too.
In an uncharacteristic display, Federer argued with chair umpire Jake Garner during a changeover in the U.S. Open final Monday. He said his opponent, Juan Martin del Potro, was given too much time to challenge a line call.
"I wasn't allowed to challenge after 2 seconds. The guy takes, like, 10," Federer said.
Then the 15-time major champion used a profanity in addressing Garner: "Don't tell me to be quiet, OK? When I want to talk, I talk. I don't give a ... what he said."
CBS microphones picked up the exchange during its live broadcast of the match.
Copyright 2013 Associated Press. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.