What is going on between Jose Mourinho and Paul Pogba at Manchester United?After the Portuguese boss spent a then-world-record fee on the French midfielder last summer, it looked as though Pogba would have a long and successful career at Old Trafford.However, there are now murmurings that he’s not necessarily happy at the club and his relationship with Mourinho is strained.There’s no doubt that Pogba’s form has dipped in recent weeks.He was poor during United’s 2-0 loss to Spurs and was dragged off. He was left on the bench for the visit of Huddersfield in the league a few days later before he was, once again, substituted during their 1-0 defeat to Newcastle.Reports then emerged that there was a big row between Pogba and Mourinho and that the midfielder was now regretting his move to the Theatre of Dreams.And when he pulled out of United’s FA Cup clash with Huddersfield at the weekend due to illness, the speculation certainly didn’t go away.To make matters even worse, Pogba was left on the bench for United’s Champions League last-16 clash against Sevilla. Twenty-one-year-old Scott McTominay was selected in his place with many United fans left scratching their heads.But why wasn't Pogba playing in one of the biggest matches of the season?

MOURINHO EXPLAINS WHY POGBA WAS ON THE BENCH 

Well, as you’d expect, that was the first question asked by BT Sport’s Des Kelly when Mourinho had his pre-match interview.

Mourinho’s explanation?

"Because McTominay is working hard every day, he is feeling good and strong, he played the last match for 90 minutes and Paul last Saturday wasn’t able to play and this is the kind of game where I think a player must feel 100," he explained.

“We are going to play with 3 midfielders and Paul can play in one of the two roles where Herrera and McTominay are going to play.

“Paul created some doubt by not playing on Saturday by his own decision, he was not feeling good and that created some doubt.”

Hmmmm.

“By his own decision.” It seems Mourinho wasn’t too happy with Pogba pulling out of the FA Cup tie against Huddersfield due to his illness. In fact, the manager even claimed he “didn’t care” about Pogba’s illness ahead of the clash against Huddersfield.

One thing is for sure, Mourinho is only fuelling the speculation by continuing to leave Pogba out.