2003 in American tennis

2003 US Open

2003 Tennis Masters Cup

2003 Western & Southern Financial Group Masters

2003 Pacific Life Open

2003 NASDAQ-100 Open

2003 Bank of the West Classic

2003 WTA Tour Championships

2003 Family Circle Cup

2003 Advanta Championships

2003 Miller Lite Hall of Fame Championships

2003 Franklin Templeton Classic

2003 Delray Beach International Tennis Championships

2003 Bausch & Lomb Championships

2003 Sarasota Clay Court Classic

2003 U.S. Men's Clay Court Championships

2003 Pilot Pen Tennis

2003 State Farm Women's Tennis Classic

2003 Acura Classic

2003 Mercedes-Benz Cup

2003 Siebel Open

2003 JPMorgan Chase Open