Dimitri Payet celebrates scoring for West Ham United
Interestingly, Pogba was on the books of United from 2009 until 2012 before he left Old Trafford to join Italian giants Juventus on a free transfer.
Former Liverpool striker Collymore believes that the Juventus midfielder is not worth £100m.
The former England international has stated that instead of recruiting Pogba, United should sign his France international teammates N’Golo Kante and Dimitri Payet.
France's Paul Pogba
“The smarter move from Mourinho would be to sign two other members of the France team who’ll take on Portugal in the Euro 2016 final on Sunday night – N’Golo Kante and Dimitri Payet instead,” Collymore wrote in The Mirror.
“Because what United need is to be good in the here and now of this season and, while I have no doubt Pogba could become one of the best midfielders on the planet in time, I don’t think he’d guarantee the immediate success in the way those two would.”
Pogba, Kante and Payet are all playing for France at the ongoing 2016 European Championship.
France will take on Portugal in the final of the prestigious competition at Stade de France in Saint-Denis on Sunday evening.
France's N'Golo Kante in action with Romania's Nicolae Stanciu