NEW YORK (AP) - Serena Williams has issued a second statement to "sincerely apologize" for what she calls her "inappropriate outburst" at the U.S. Open.
The apology was issued Monday, more than 36 hours after Williams' profanity-laced tirade at the lineswoman.
The official called a foot fault late in the defending champion's semifinal loss to Clijsters on Saturday night.
Williams was fined $10,000 for unsportsmanlike conduct and could face further penalties. She and her sister Venus are playing in the women's doubles final.