Marcus Rashford is stood over the ball - he wouldn't be my first guess at set-piece taker. He whips it in towards the far stick, Victor Moses clearing as Chelsea burst out on the counter attack...

Jesse Lingard isn't a £100k-a-week player, laughed more or less everyone when his new deal was announced the other week. He's looking like it today.

He again causes bother for Chelsea, winning a free-kick in a dangerous position about 35 yards out...

Phil McNulty
BBC Sport chief football writer at Old Trafford

Pace. Width. Those are the things really bothering Chelsea at the moment and Manchester United's fans are loving it.

Antonio Conte, wearing a neat little baseball cap, looks calm while Jose Mourinho is pacing his technical area. He looks like a man who wants this one badly. 

Image source, PA

Marcus Rashford and Jesse Lingard are bang up for this one today. Their pace is giving Chelsea the creeps. United go down the left flank again, the move coming to nothing as Asmir Begovic nervously clears from inside his six-yard box.

Danny Mills
Ex-England defender on BBC Radio 5 live

Not sure if that was a cross of shot from Ashley Young? Rashford was close to it as it came in. David Luiz might have impeded him ever so slightly.

This is very unChelsea-like. They're all over the shop at the back.

Image source, Getty Images

Still United are doing all the running. United skipper Ashley Young pops up on the left side of the Chelsea box, drilling low across the face of Asmir Begovic's goal.

Danny Mills
Ex-England defender on BBC Radio 5 live

This is why Costa won't get nominated as PFA player of the year, because the players vote for it. Bobby Madley is talking to him, but I don't think he has any idea what has gone on. It is a little shove in the back. It wasn't as dramatic as Bailly was trying to make out.

Image source, Reuters

This hardly needs the fuse lighting - but Diego Costa is a footballing pyromaniac. The Chelsea shoves Eric Bailly over needlessly as they wait for that aforementioned cross, United players responding with a few angry words.

Ref Bobby Madley wades in like a WWF official, keeping angry men apart with his arms.

David De Gea has barely broken sweat yet. The Manchester United keeper wanders off his line to gather Victor Moses' deflected cross from the right flank.

All Manchester United at the moment. Jose Mourinho still isn't smiling though.

Image source, Getty Images

Chelsea's lead at the top of the Premier League will remain at just four points if this scoreline stays the same.

Parts of North London, as well as Manchester, erupted following Rashford's opener. (That's because of Tottenham fans, not a cheap jibe at all United fans living down south...)

Danny Mills
Ex-England defender on BBC Radio 5 live

There is going to be a lot of consternation about this goal. It is a clear handball from Herrera. His arm is outstretched. But one ball behind David Luiz and Rashford is on to it and after two poor touches earlier he takes his first real chance. It is a good finish. Conte will be furious with the Cheksea players and Herrera. The referee has made an error.

Phil McNulty
BBC Sport chief football writer at Old Trafford

Chelsea manager Antonio Conte complained that Manchester United made Eden Hazard a deliberate target for rough treatment in the FA Cup tie at Stamford Bridge. Ander Herrera is already in very close proximity to the Belgian.

Danny Mills
Ex-England defender on BBC Radio 5 live

Passing for passing sake from Manchester United. Chelsea paying a lot of respect to United, almost playing a 5-4-1.

David Luiz dillies, Jesse Lingard doesn't dally. The newly-even-richer Lingard (he's just signed a contract worth £100k apparently) robs David Luiz about 35 yards, feeding the supporting Marcus Rashford. But the teenage striker drags his shot well wide of the left post. 

It might be gloomy in Manchester, but Eden Hazard has a shadow following him. It is called Ander Herrera. Looks like a man-marking job for the Spaniard.

Hazard escapes him briefly about 30 yards out from the United goal, but can't pick out a Blue shirt with his pass.

Not much to report in terms of the actual action so far. Chelsea enjoying plenty of possession at the back, knocking the ball around with Kurt Zouma getting a few early touches.