Washington Wizards guard Gilbert Arenas is frustrated about not being on the U.S. national team playing in the world basketball championships and said he believes he was not given a fair tryout.

When Arenas left the squad on Aug. 14, national team managing director Jerry Colangelo said it was because Arenas had an injured groin. But in his first comments since then, Arenas, the Wizards' leading scorer and a two-time all-star, said he didn't think he was going to make the 12-man roster and that the injury became an excuse to part ways.

"They already knew what they wanted. They said it was a tryout, but they already had their team selected," he said after playing in a Goodman Summer League game at Barry Farms Park in Southeast Tuesday night and showing no signs of the injury.

Arenas emphasized that he hopes to remain part of the national program and play in the Beijing Olympics in 2008.