The France international made a blistering start to the Premier League season following two goals and two assists in his opening four games.
However, Pogba suffered a hamstring problem in September to sideline the versatile midfielder for almost two months before his return in a 4-1 win against Newcastle in November.
The 25-year-old has struggled since his comeback and has been criticised for his poor performances in the heart of the Manchester United team.
Pogba hasn’t been effective in a midfield pair alongside Nemanja Matic to prompt Jose Mourinho to drop the France midfielder for their Champions League round of 16 loss to Sevilla.
However, former Manchester United captain Robson believes the club’s record signing Pogba needs to play as part of a midfield three to be able to affect games.
“I wouldn’t want to take away from Paul the vision he has got to hit a pass,” Robson told Irish radio station Newstalk.
“We’ve had the best out of him when Jose has played a solid 4-3-3, with [Nemanja] Matic sitting and then Pogba being allowed to do what he wants to do. I don’t think it works with a two with Paul. I think he gets more freedom if you’re playing a three in there.”
Pogba moved to Manchester United in an £89m deal from Serie A giants Juventus in the 2016 summer transfer window.
Sir Alex Ferguson sold Pogba in an £800,000 deal to Juventus in 2012 after he was unable to guarantee the versatile midfielder regular first-team football.
Manchester United are in second place in the Premier League table.
MORE: Man United latest news
MORE: Arsenal latest news
MORE: Chelsea latest news
MORE: Liverpool latest news