United were held to a drab goalless draw in the Champions League by Valencia at Old Trafford
Charlie Nicholas says there will be a growing clamour to appoint Zinedine Zidane
Jose Mourinho's days as Manchester United manager are numbered with calls to replace him with Zinedine Zidane set to get louder, according to Charlie Nicholas.
United were held to a goalless draw by Valencia in the Champions League group-stage match at Old Trafford on Tuesday, meaning Mourinho has now gone four consecutive home games in all competitions without a win for the first time in his managerial career.
There is a growing sense that Mourinho's time at United is coming to an end, and Sky Sports pundit Nicholas expects the calls for Zidane to replace the beleaguered Portuguese boss will grow in the coming days
Mourinho is coming under increasing pressure after a run of poor results
He said on Soccer Special: "Well it's a really tame, poor performance that lacked any real desire.
"Defensively they were OK, but this was another poor, boring, and dull Manchester United performance.
"Of course, all the pressure is going to come on the manager. There will be a bit that will get to [Alexis] Sanchez's door because he was taken off again, and [Paul] Pogba's door, but these players can go home tonight, they can turn up tomorrow and they'll get on with it.
"The questions will be asked, and it'll be Jose who's going to have to face the music.
Zidane has been tipped as the likely replacement after leaving Real Madrid
"It's running down, I didn't expect him to finish this season but I didn't see it ending like this. I don't see this lasting.
"I think we might come back from the international break and if Jose is in the pain that he looks in, I think there'll be a deal done. Everyone is ringing this Zidane bell at the moment. It's going to get louder this week."
United are winless in their last four games in all competitions at Old Trafford, their longest such run since December 2015.
The damning statistics all point towards a group of players that are losing faith in their manager with United having run fewer miles than any of their opponents this season.
Mourinho has failed to get the best out of Alexis Sanchez during his tenure
Alexis Sanchez was once again a peripheral figure in the Valencia stalemate, losing the ball on 26 occasions - more than any other United player.
The Chilean has had just 10 shots on target in his last 20 matches, and Nicholas doesn't expect the forward to win over the United supporters.
"I always said this when he was at Arsenal," he added. "He sat on that left-hand side, and sulked and sulked and sulked. He was a street-fighter, a warrior. That's gone, those days have gone. Sanchez is no more.
"He's got to get out of Manchester United because these fans aren't interested in watching him."