Manchester City's new signing Carlos Tevez denied on Tuesday that Manchester United manager Sir Alex Ferguson did his best to keep him at Old Trafford. The 25-year-old Argentinian international striker has signed for United's city rivals in a 25.5 million pounds five-year contract after his two-year deal at United ran out at the end of last season. As United headed towards its 18th league title at the end of last term, speculation about whether United would extend Tevez's contract grew ever more debated before Ferguson decided not to keep the Argentinian. However, Ferguson suggested on Monday that he had in fact wanted to retain Tevez's services and said that he had tried to contact him in January regarding his future - only to be ignored by his player. Those claims were comprehensively refuted by Tevez at his unveiling at the City of Manchester Stadium on Tuesday as he insisted that Ferguson had never once been in touch. “The fact I didn't stay at United was not about the fans it was because David Gill (chief executive) and Ferguson did not do enough to keep me there,” Tevez said. “I was there for two years and Sir Alex never called or sent any text messages in that time. “The only time he talked to me was after a match against Roma to discuss a situation about going to play for Argentina. “It doesn't seem that this is the way to treat a player in two years at the club ... Money was not the most important thing about my move,” Tevez said through a translator at the City of Manchester Stadium. “I have a coach who wants me and a good fan base and environment around me.” Manchester City has not won English football's top-flight title since 1968 - in stark contrast to United's seemingly endless run of trophies over the last 15 years - but Tevez insists he is not concerned about the past and will use City's lack of silverware as a major motivation. “The ambition I have here is to help Manchester City recover the status that the club once had as one of the best clubs in England,” Tevez added. “I am here to try and win titles and trophies - that is my main ambition.”