Kevin Durant withdrew Thursday from the US national team, the biggest loss yet for a weakening American squad that will go to Spain without the leading scorer on its past two gold medal winners.

The NBA's MVP took part in the Americans' training camp in Las Vegas last week but then informed team officials he wasn't going to continue.

"Kevin reached out to coach K (Mike Krzyzewski) and myself this afternoon and expressed he is just physically and mentally drained from the NBA season and his attention to his many responsibilities," USA Basketball chairman Jerry Colangelo said in a statement.