Playing on today ManU     vs  QPR         13:30 SS3    Arsenal      vs  Man City 16:30 SS3    LONDON - Roberto Mancini accepts his job may not be guaranteed long-term, even though he believes he has laid the foundations for Manchester City’s future success.His position has become the subject of speculation recently following a series of slip-ups as the title race hots up.Mancini, who succeeded Mark Hughes in December 2009, said: "We have improved a lot as a team, as players, as a club."When you choose the job you should know anything can happen any moment but I don’t have any problem with this.”Despite a sustained challenge for a first league title since 1968 and last season’s FA Cup success - which ended a 35-year trophy drought - Mancini knows things can change very quickly.City, having led the table for most of the season, now trail rivals Manchester United by five points with seven games remaining having only won once in their last four league matches.While Real Madrid’s former Chelsea and Inter Milan boss Jose Mourinho has been linked with the Etihad there has been no suggestion from City’s Abu Dhabi-based owners that they are considering a management change.City face a must-win game at Arsenal on Sunday, shortly after the final whistle at Old Trafford, where United can open up an eight-point gap if they beat QPR.Mancini has already conceded that the race would be over if City lose at Arsenal and Sir Alex Ferguson’s men win.Arsenal manager Arsene Wenger , meanwhile, believes United will win a 20th title because they have men who can deliver when it comes to "money time”.Wenger remains impressed by their ability to dig out results when not firing on all cylinders."Manchester United are surprisingly in a comfortable position, no-one expected them to be because they did not look absolutely irresistible this year,” he said.