Fifth booking of the game...Bastian Schweinsteiger brings down Nemanja Matic.

Ten minutes of normal time left. A huge roar goes up from the home fans. They're urging their side forward.

United are bossing possession. They're pinging the ball around outside Chelsea's penalty area but they can't create an opening. Chelsea's defence is standing firm. 

Image source, EPA

Another United change. Juan Mata is replaced by the fresh legs of Memphis Depay. Frustration creeping in at Old Trafford. Thirteen minutes of normal time remaining to get a goal.

Are United going to score? They have done everything but. Fifteen minutes left.

Air kick from Wayne Rooney inside the Chelsea box with only the keeper to beat. It wouldn't have counted. He's offside.

Image source, AFP

Eden Hazard, who has been kicked black and blue, shows his frustration as he fouls Ashley Young and is booked.

Chelsea are first to make a change. Ramires replaces Willian before United react by sending on young defender Cameron Borthwick-Jackson for Matteo Darmian.

I feel sorry for the sponsors who have to name a man of the match. Courtois? De Gea? Martial? Hazard? It definitely won't be Matic after that miss.

Image source, Reuters

Just over 20 minutes remaining. This could go either way. Bore draw this is not. Stand by for a grandstand finish.

Image source, Reuters

Phil McNulty
BBC Sport chief football writer at Old Trafford

"For all Manchester United's pressure, there has not been a clearer opportunity than that one Nemanja Matic just had.

He never gave off any air of confidence that he would score - and what a blow it would have been to United after their dominance. Right in the balance now."

Chris Waddle
BBC Radio 5 live at Old Trafford

"That's a terrible finish from Matic. What a chance! But you have to question United's set up to have allowed him to be sent clean through like that."

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No goals but incidents galore. Shortly after Ander Herrera had been denied earlier Willian appeared to handle the ball while attempting a clearance. No penalty awarded.

What a miss! Chelsea catch United on the counter and Nemanja Matic is clean through with only David de Gea to beat, but he can't keep his composure and sends the ball high over the bar - a match-winning chance missed.

They have hit the woodwork twice and they have been denied by the brilliance of Thibaut Courtois. What on earth do United need to do to put the ball in the net?