Ruben Amorim accused of 'disrespecting' another Man Utd star during Leicester win as fans ask 'What is he thinking?'

Manchester United fans have hit out at Ruben Amorim for disrespecting a key player during the FA Cup win over Leicester City.

On Friday evening, United survived a scare in the FA Cup as they came back to beat Leicester City 2-1 at Old Trafford.

An early goal from Leicester's Bobby De Cordova-Reid wasn't enough as Joshua Zirkzee equalised and Harry Maguire scored a injury time winner to win the match and knock his former team out of the competition.

Although United fans were ecstatic with the win, there was one moment in the match that has caused them to take to social media to call out manager Amorim for one disrespectful decision.

In recent months, some United fans have accused Amorim, who joined the club as manager in November, has mistreated some of the club's top players, most notably Marcus Rashford, who left the club on loan in the winter transfer window.

And now, fans have called him out for over his decision to bring Casemiro on as a substitute in the 94th minute of the match in an effort to run the clock down after they had taken the lead.

Reacting to the moment on social media, one fan wrote: "What on earth is Amorim thinking? Introducing Casemiro at this stage of the game is utterly disrespectful.

"A player of his stature should not be subjected to such an indignity. This is entirely unacceptable."

Agreeing with the comment, another fan added: "I don’t understand that nonsense. WTF was he thinking?"

Casemiro has struggled at Manchester United in recent months. (Image: Getty)

While another added: "Brought Casemiro on to waste time when Toby Collyer was literally sitting on the bench—please make it make sense."

After an impressive first season with United, Real Madrid legend Casemiro has struggled to find regular minutes with the Premier League side.

The Brazilian has made just seven appearances since Amorim's arrival and has not played in any of United's last five Premier League matches.

He had been heavily linked with a move away in either last summer's transfer window or the recent winter window, but no deal materialised, with his massive £350,000 weekly salary a likely road block to a move.