On match point in the U.S. Open semifinals Saturday night, defending champion Williams was penalized a point for unsportsmanlike conduct - a bizarre, ugly finish that gave a 6-4, 7-5 upset victory to unseeded, unranked Kim Clijsters.
The match featured plenty of powerful groundstrokes and lengthy exchanges. No one will remember a single shot that was struck, though, because of the unusual, dramatic way it ended.
Images: Copyright AP. Unauthorised reproduction prohibited.
Image: Serena Williams reacts after losing a point to Kim Clijsters during their match at the U.S. Open tennis tournament in New York, on Sept. 12, 2009.