Andy Roddick will not compete at this year's Olympics in Beijing as the world number six wants to defend his Legg Mason Classic title in Washington.
Roddick's primary aim is to win the US Open in September
Both events will be held from 11-17 August and the American believes staying on home soil will be better preparation for the US Open.
"My goal every summer is to win the US Open," said the 25-year-old.
"I've won the Classic three times and defending my title best prepares me for another Grand Slam."
Roddick has enjoyed a successful start to the season.
He won his 25th career title last week - his second of the year - with a 6-7 (8-10) 6-4 6-2 victory over Spaniard Feliciano Lopez in the final of the Dubai Championships.
Flushing Meadows is the scene of Roddick's only Grand Slam success, back in 2003, and the former world number one is eager to taste glory again at this year's US Open, which will be held from 25 August to 7 September.
Roddick won in Washington in 2001, 2005 and 2007. He beat compatriot John Isner 6-4 7-6 in last year's final.