Oklahoma City Thunder's Russell Westbrook (0) watches as teammate Kevin Durant shoots a free throw during the second half of Game 5 of the Western Conference finals NBA basketball playoff series against the San Antonio Spurs, Thursday, May 29, 2014, in San Antonio. (AP Photo/Eric Gay)

Oklahoma City Thunder guard Russell Westbrook has withdrawn from USA Basketball's roster for the World Cup in Spain this summer, league sources told Yahoo Sports.

Westbrook had been part of gold-medal-winning teams in 2010 and '12 in the world championships and Olympics, respectively, and has been a favorite of national coach Mike Krzyzewski.

Westbrook, 25, still has hopes of playing in the 2016 Olympic Games in Brazil, sources said.

Westbrook's decision leaves the opportunity for Golden State's Stephen Curry to compete for a roster spot with Cleveland's Kyrie Irving and Portland's Damian Lillard. Chicago's Derrick Rose is still deciding whether he'll play for USA Basketball this summer.

After a season that included his third surgery on his right knee, Westbrook decided to pass on the two-month commitment that includes a July training camp, August exhibition tour and September tournament in Spain.