Pogba limped out Manchester United’s 3-0 win at Old Trafford after pulling up in the first-half.
The France superstar tried to carry on but called it quits after struggling to move around the pitch.
He was seen leaving the ground on crutches after the game, and Sky Sports pundit Tony Cottee doesn’t expect to see Pogba back in action any time soon.
“A hamstring (injury) is six weeks (out),” he said when reviewing United’s dominant victory.
“The treatment is better these days, so it could be four weeks if he's lucky.
“But he definitely pulled it. He pulled up sharp, he tried to carry on, he couldn't, and they took him off.
“I’d definitely be worried (if I was Mourinho) over how long he's going to be out now.”
Pogba’s team-mate Marcus Rashford admits the midfielder’s injury is a huge blow.
“Paul's going to be a massive miss and hopefully we can get him back fit as soon as possible,” the striker said.
"That's why you have such a strong squad.
“It's good for the manager, it's good for the players as well because we're always playing for competition.”
