Two years after Serena Williams' infamous outburst at the 2009 US Open in a match against Kim Clijsters, the American 13-time Grand Slam champion has again apologized for her latest outburst on court in New York. “My emotions did get the best of me this past weekend when I disagreed with the umpire,” Williams tweeted Wednesday. “It has been a long road to get back to the US Open this year, and I am thankful to have had such a great two weeks in New York.” Williams' tweet came two days after she was cited for a code violation and fined $2,000 for verbally abusing chair umpire Eva Asderaki. Facing a break point while serving in the first game of the second set Sunday night, Williams hit a forehand that she celebrated with a yell of “Come on!” Asderaki applied the hindrance rule, noting the scream came while Stosur reached out and got a racket on the ball. Asderaki awarded the point to Stosur. That set Williams off on a series of insults directed at the official, reminiscent of her tirade on the same court when she berated and brandished her racket at a line judge who called a foot fault in the 2009 semifinal against Kim Clijsters. Williams lost to Stosur in straight sets, giving Stosur her first ever Grand Slam title. BM