Serena Williams wins in the first game of her last U.S. Open.

Which is rumored to be her last U.S. Open, Serena Williams triumphed in her first match on Monday night.

At Flushing Meadows in New York City's Arthur Ashe Stadium,

where she won the 1999 U.S. Open at the age of 17, Williams defeated Danka Kovinic 6-3, 6-3.

After a long career in which she dominated and changed the women's game and won 23 Grand Slam singles titles, 

Williams, 40, announced earlier this month that she would be retiring from tennis.

After the game, Williams said, "Just keep supporting me as long as I'm here.

She "truly set the standard in the women's game with her powerful serve,

 return of serve, and athleticism," NPR's Tom Goldman said on Morning Edition.

Click Below To See More...