Carlos Tevez claims he has joined Manchester City because Manchester United did not do enough to persuade him to stay.

The Argentina international completed his much-touted move to Eastlands on Tuesday, penning a five-year contract with the Blues.

He had spent the last two seasons with City's arch-rivals United, but has opted to cross the Manchester divide.

United had always insisted that they were keen to turn Tevez's two-year loan deal at Old Trafford into a permanent agreement.

However, the combative striker insists Sir Alex Ferguson and United chief executive David Gill failed to convince him that he was an important part of their future plans and, as such, he has decided to take on a new challenge at City.