NEW YORK - Serena Williams has been fined US$2,000 by the U.S. Open for berating the chair umpire during the final.

Tournament referee Brian Earley issued his ruling Monday, a day after Williams was cited by chair umpire Eva Asderaki for a code violation for verbal abuse during a 6-2, 6-3 loss to Sam Stosur at Flushing Meadows.

Williams earned $1.4 million at the U.S. Open: $900,000 for reaching the final, plus a $500,000 bonus for finishing first in the standings of the U.S. Open Series, which takes into account results at hardcourt tuneup tournaments.

The USTA also said Grand Slam committee director Bill Babcock determined "Williams' conduct ... does not rise to the level of a major offence." She was under probation because of an outburst at the 2009 U.S. Open.