Grand Slam administrator Bill Babcock's ruling, released Monday, says Williams faces a "probationary period" at the sport's four major championships in 2010 and 2011. If she has another "major offense" at a Grand Slam tournament in that time, the fine would increase to $175,000 and she would be barred from the following U.S. Open.
"But if she does not have another offense in the next two years, the suspension is lifted," Babcock said in a telephone interview from London.
He said Williams is handing over $82,500 right now to the Grand Slam committee, already nearly double the previous highest fine for a Grand Slam offense. In 1995, Jeff Tarango stormed off the court at Wimbledon and accused the chair umpire of showing favoritism to certain players in exchange for their friendship. He was fined a total of $43,756, which was reduced to $28,256 on appeal, and barred from Wimbledon the next year.
Williams lashed out at a lineswoman after a foot-fault call at the end of her semifinal loss to eventual champion Kim Clijsters at the U.S. Open in September. It was a profanity-laced, finger-pointing, racket-brandishing display in which Williams approached the official with what tournament director Jim Curley called "a threatening manner."
"I am thankful that we now have closure on the incident and we can all move forward," Williams said in a statement released Monday by her publicist. "I am back in training in preparation for next season, and I continue to be grateful for all of the support from my fans and the tennis community."
She earned $350,000 by reaching the U.S. Open singles semifinals, part of her more than $6.5 million in prize money in 2009, a single-season record for women's tennis. Her career prize money tops $28 million.
The 11-time Grand Slam singles champion ended the 2009 season at No. 1 in the WTA rankings.
Williams' outburst drew a $10,000 fine from the U.S. Tennis Association in September -- the maximum on-site penalty. Because it happened at a Grand Slam tournament, Babcock was called on to investigate whether further punishment was merited.
He concluded that Williams violated the "major offense" rule for "aggravated behavior." The Grand Slam committee -- with one representative from each of the sport's four major championships, including USTA president Lucy Garvin -- approved his decision Saturday.
Babcock said a "major offense" under Grand Slam rules is "any conduct that is determined to be the 'major offense' of 'aggravated behavior' or 'conduct detrimental to the game.'" There is no specific definition of what sort of actions constitute a "major offense."
He said the highest possible fine that Williams could face -- $175,000, if she violates her Grand Slam probation -- was chosen because it is the difference in winnings between reaching the quarterfinals and semifinals at the U.S. Open.