Former England captain David Beckham has indicated that he could come out of retirement to play for the Major League Soccer team he is aiming to launch in Miami.

The 39-year-old hung up his boots last year after winning the French League title with Paris St Germain, bringing the curtain down on a 20-year career, but he clearly misses playing.

"There's never been a player-owner, but maybe?" Beckham said in a BBC documentary that follows the former Manchester United and Real Madrid midfielder on a 12-day trip into the Amazon rainforest by motorbike, canoe and plane.

In the program "David Beckham: Into the Unknown," which will be aired on June 9, he admitted having "a tough time" after quitting playing but following what he described as "a stage of enjoying the rest," he is considering coming out of retirement.

"Now I go to watch a basketball game and, when you are watching athletes play at the top of their game, it gives me that itch again and I want to be back in the game and I start thinking to myself 'Could I play again? Could I go back? Could I come out of retirement and start playing again?' " he said.