Chance for career revival: Freddy Adu trains with a Spanish top league club (VIDEO) © EuroFootball.com

One of the most promising football players on the planet, once considered to be Freddy Adu, will train with the "Rayo Vallecano" club. There is a possibility that a long-term contract will be made.

The training period is expected to last 12 days and will begin on Friday.

The American was previously considered one of the most talented players of his generation, but he failed to establish himself in Europe. He wore the jerseys of teams such as Lisbon's "Benfica," "Monaco," Salonika's "Aris," as well as Turkey's "Cauykur Rizespor," but did not impress specialists.

Lately, Adu has been playing for the Philadelphia "Union" club and has also been called up to the U.S. national team.

Adu's moments of play: