United States coach Jurgen Klinsmann said that he will keep his FIFA World Cup™ options open as long as he can, taking 30 players to a final training camp this month.

"We definitely will go with 30 players," he said in a video interview released by US Soccer discussing the training camp at Stanford University in northern California. "The timing is still complicated. Some come back from injuries, some we need still to see and evaluate in the camp then itself, so we decided to take advantage of this whole 30-man roster.

"It makes it a little bit more tricky with the training sessions, but we prepared them already, so we have good, quality work prepared for them."

All World Cup teams must give FIFA their 30-man provisional squads by 12 May. The final 23-man squads must be declared by 2 June.

Klinsmann had originally expected to take 26 to 28 players to the final training camp that opens on 14 May, but said getting a first-hand look at all the players at his disposal was vital.

"For us coaches, it's really, really important to see every one of them, in every training session, in scrimmages, and over the stretch of two and a half weeks, to be sure that we really have the right 23 going to Brazil," he said. The former German international Klinsmann predicted "a very competitive camp".

The United States has three friendly tune-ups scheduled before the World Cup, on 27 May against Azerbaijan in San Francisco, on 1 June against Turkey in Harrison, New Jersey and on 7 June against Nigeria in Jacksonville, Florida.

USA are drawn in Group G in the first round of the World Cup, along with Germany, Portugal and Ghana.