LeBron James, Chris Paul and Carmelo Anthony have rejected an offer to play in a six-game world tour featuring NBA stars, a move that could jeopardize plans for the global trek set to begin on Sunday.

ESPN, citing unnamed sources, reported on its website on Wednesday that the all-star trio had rejected the plan and their refusal has caused NBA scoring champion Kevin Durant to think twice about playing in the games.

Other stars Kobe Bryant, Dwyane Wade and Dwight Howard are among the players set to headline the World All-Star Classic on Sunday in Puerto Rico, organizers said on Wednesday.

The San Juan event will also feature NBA stars Amare Stoudemire, Blake Griffin, Kevin Garnett, Carlos Boozer, Chris Kaman, Chris Bosh, Kevin Love, Paul Pierce, Rajon Rondo and Tyson Chandler.

The game is meant to be the first stop on a six-game world tour with games on Nov 1-2 at London, Nov 6 at Macao and Nov 8-9 at Melbourne, Australia.

But ESPN reported the remainder of the tour could be postponed after the Puerto Rico game, which featured brisk ticket sales and will see a portion of proceeds donated to player charities.