Coming on in the 87th minute of Manchester United’s Carabao Cup contest against Swansea on Tuesday evening must have felt like a worthless experience for Luke Shaw.

It says a lot that the left-back was making just his second first-team appearance all season.

And Jose Mourinho didn’t feel like giving him a major role, instead choosing the final minutes of a match that Man United had already won to bring him on.

Shaw, still only 22, has never fully recovered from that horrific double leg break he suffered in September 2015.

A combination of more injuries and fitness problems contributed to Shaw making only 20 appearances last season and fans are simply left to wonder whether the defender will ever reach the heights that propelled the Red Devils to pay £30 million three years ago.

That fee made Shaw the world’s most expensive teenager at the time. He couldn’t be further from such acclaim today.

Shaw and Mourinho disagree with his attitude

It’s beginning to feel like now or never for the former Southampton defender, but it would appear he’s ready to choose the latter option.

According to Jamie Jackson of The Guardian, Shaw’s relationship with Mourinho “has broken down to such an extent that the left-back is concerned his Manchester United career is effectively over.”

While Mourinho is unhappy with Shaw’s attitude, the player feels that he’s done everything in his power to prove himself and simply hasn’t been given an opportunity to prove his worth in the first-team.

Indeed, Shaw’s efforts in a recent Under-23 performance against West Ham suggests his heart just isn’t in it. Check that out HERE.

As for his future, Jackson adds that Shaw is considering his options - of which there will be plenty. It is claimed that a permanent departure in January is unlikely.

It’s hardly surprising that Shaw no longer feels he has Mourinho’s support. The Portuguese coach publicly called him out in April and Shaw has done little since to turn his manager’s head.

“I cannot compare the way he trains, the way he commits, the focus, the ambition,” Mourinho said after leaving Shaw out of his squad for a 0-0 draw against West Bromwich Albion.

“I cannot compare. He is a long way behind.”

It now seems like it would be best to cut ties. For all parties.