Serena and a tournament of firsts — how this year's U.S. Open made history
Several of the players marked firsts for the sport's history, while for Serena Williams, the tournament may have been her last match.
The U.S. Open tennis tournament ended Sunday and history was made, as several competitors broke ground as the firsts, while 27-year veteran Serena Williams punctuated her career by participating in what is thought to be her last match.
Serena Williams may bid the sport farewell
Williams, , said in August that
