The former world number one is fined by the US Tennis Association after calling judge Carlos Ramos a "liar" and a "thief".
Serena Williams has been fined more than £13,000 ($17,000) after receiving three code violations in the US Open.
Williams lost her cool during the final on Saturday, launching a tirade against umpire Carlos Ramos after getting a warning for coaching from the stands early in the second set.