Spanish high-flyers Valencia unveiled their new Argentinian signing Pablo Cesar Aimar, whom they hope will reinvigorate their rapidly waning title challenge, here on Wednesday.

The 21-year-old playmaker, .whose contract with Argentine side River Plate was on ihe verge of expiring, will join Hector Cuper's 2000 European Cup finalists for around 20 million dollars.

Aimar. who joins Valencia at a lime when they trail leaders Real MadriTbv 10 poinis ami with their supporters complaining of Cuper's ullra-conseivalive tactics, has a 72.5 million-dollar buy-out clause written into his contract.

Valencia will pay River Plate a commission of 10 percent if they decide to sell the player on.

The classy midfielder, who was presented io 2000 of the team supporters on Wednesday afternoon, said he was ready to live up to his reputation and show the Valencia supporters what he could do.