Jose Mourinho needs time to turn Manchester United back into title challengers
Mourinho replaced Louis van Gaal in the Old Trafford dugout last summer but has struggled with inconsistencies.
His side are unbeaten since October in the league but still remain fifth and four points behind Manchester City in fourth.
Jose Mourinho's side are still in the battle for the Champions League places
Jose Mourinho could lead United to the Europa League having already won the EFL Cup
And Vidic, the club's former defender, believes Mourinho has the pedigree to get things right and expects them to be challenging for the top honours again next season.
"We are not in the position we would like to be of course but we are fighting for the Champions League," Vidic told Man United's official club website.
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"Before the season you always think United should compete for the title but it is not easy. Mourinho came and brought in four players, but to build a winning team you need time, six months is not enough, but I do believe the team is growing.
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"Mourinho has been in charge of big teams and won trophies in different countries so he has experience and I believe he knows what he is doing.
"I am looking forward to next season, but this season realistically, if we can get Champions League and the cup we won already then we have to be satisfied this year."