UPDATE 2-Soccer-Argentine Tevez leaving Manchester United

* Striker rejects five-year contract at Old Trafford

* Joorabchian says United did not give Tevez enough time

* Next stop could be Manchester City or Chelsea

(adds Joorabchian reaction)

LONDON, June 20 (Reuters) - Unsettled Argentina forward Carlos Tevez is to leave Manchester United, the Premier League champions said on Saturday.

Tevez, 25, whose "economic rights" are owned by agent Kia Joorabchian, left West Ham United for Manchester United on a two-year deal in August 2007.

He spent much of last season on the bench and his last appearance was as a substitute in the 2-0 Champions League final defeat by Barcelona in May.

A statement on the club website (www.manutd.com) said United had agreed a fee of 25.5 million pounds ($41.71 million) and offered a five-year contract which would have made Tevez one of the team's highest-paid players.