It is being called a "meltdown for the ages" or at least the best courtside explosion since the good old days of John McEnroe.
Serena Williams was called for a foot fault in her US Open Women's Semi-Final match against Kim Cjisters of Belgium Saturday night, and she let it rip at the lineswoman.
"If I could I would take this ****ball and shove it down your ***** throat and kill you," Williams could be heard saying.
That brought the tournament manager and the chair umpire into the fray, with Serena then denying that she's threatened to kill anyone.
She was slapped with a penalty that on top of the one she'd been given for breaking her racket after losing the first set meant Serena was out.
She lost the match 6-4, 7-5, and was followed off the court by a chorus of boos from the fans.