Fulham defender Paul Konchesky has hit out at West Ham boss Alan Curbishley, claiming he is 'sure' the manager was the reason behind Carlos Tevez's decision to leave the club.Konchesky played under Curbishley at Charlton and West Ham but left the East End club this summer and insists the Hammers chief was his motivation for leaving. 'There was, and still is, a lot of unhappy players at the club who don't like him. I am one of them and he knows that, and that is why I left the club,' he told The People. 'I know there are a lot of players who don't think he is any good. 'I am sure that is one of the main reasons Carlos Tevez didn't stay at the club, and also why Darren Bent refused to sign for West Ham. It was because of the manager. 'He is hard to get on with. He doesn't have much banter; he is serious all the time, he keeps himself to himself and doesn't get involved - very old school.'