Manchester United's official account posts footage of Cristiano Ronaldo being booed

On Sunday afternoon Ronaldo came off the bench as United attempted to try and turn around the result in the second half.

There were plenty of jeers from the disgruntled home fans - and some of it came before the game when Ronaldo made his way out to the pitch.

United posted a clip of the five-time Ballon d'Or winner walking out of the tunnel to warm up with the rest of the substitutes, but boos aimed at Ronaldo were audible.

However, Roy Keane, another man who wore the armband for the Red Devils, believes the club cannot replace him due to a lack of options in attack.

"You can't let Ronaldo go out the door and think Martial is going to be the answer, Martial isn't the answer," Keane said on Sky Sports.

"He's had a decent pre-season? Big deal.

"They haven't got enough options at this moment in time. That might change in the next few weeks but from a footballing point of view, you just have to hold on to Ronaldo.

"You can't let him go when you haven't got the back-up behind it."