by FanHouse NewswireFiled under: U.S. Open, WTANEW YORK (AP) -- The U.S. Open has fined Serena Williams $10,000 for her tirade directed at a line judge at the end of a semifinal loss to Kim Clijsters.It's the maximum on-site fine a Grand Slam tennis tournament can issue for unsportsmanlike conduct.The U.S. Open said Sunday the Grand Slam Committee Administrator has opened an investigation to determine whether Williams' behavior should be considered a "major offense," which can lead to additional penalties.Williams also is being docked $500 for racket abuse in what became a 6-4, 7-5 loss Saturday night.Serena Williams Fined $10,500 for Tirade originally appeared on Fanhouse Tennis on Sun, 13 Sep 2009 19:06:00 EST . Please see our terms for use of feeds. Permalink | Email this | Linking Blogs | Comments