Martin: Greenwood, Rashford, Ighalo and Martial all on the pitch. Fernandes and Pogba to supply. Got to be goals!

It has been one way traffic in extra time so far.

Attack v defence.

Watch Tim Krul make a double save to deny Paul Pogba and Mason Greenwood as Manchester United apply the pressure in added time against Norwich.

Jermaine Jenas
Ex-Tottenham and Newcastle midfielder on BBC One

Manchester United need to be winning the game right now. Norwich are down to 10 men and against the ropes. United definitely don't want penalties.

Marcus Rashford, Odion Ighalo, Anthony Martial, Paul Pogba, Mason Greenwood all in action for United now.

Some artillery that.

More history being made, Manchester United become the first team in English football to make six substitutions in the same game.

It is an attacking one too, centre-back Eric Bailly is replaced by forward man Anthony Martial, fresh off his hat-trick on Wednesday.

United pushing now against the 10 men and smell blood.

Marcus Rashford works a yard and smashes a drive but it is at a comfortable height for Tim Krul who palmed it over the bar.

Watch Norwich City's Timm Klose receive a red card for holding back Manchester United striker Odion Ighalo in the closing stages of the second half.

Rate the players out of 10 by heading over here.

Chris Sutton
Former Norwich player on BBC Radio 5 Live

It's a tall order. Norwich will have to defend maybe like they haven't defended this season. It needs a rearguard action. The fact they have Tim Krul in goal, if they can get to penalties they will feel they have a good chance.

I think Manchester United have taken Norwich lightly.

United signalling their intent at the start of extra time.

Bruno Fernandes picks out Paul Pogba at the far post but the Frenchman cannot get enough on the ball with his header and it drifts wide.

Away we go in extra time.

A change for Norwich before extra time.

Emiliano Buendia replaced by Ondrej Duda.

Rate the players out of 10 by heading over here.

Alan Shearer
Former England captain on BBC One

As soon as United scored, they weren't prepared to go for the kill and Norwich got back into the game. It's going to be backs against the wall now for them though being down to 10.

Watch Norwich City's Todd Cantwell score a long-range equaliser to bring his side level at 1-1 against Manchester United.

Jermaine Jenas
Ex-Tottenham and Newcastle midfielder on BBC One

Fair play to Norwich, they responded well after going a goal down. They've got 30 minutes now to dig in and see if they can progress.

Additional 30 minutes to come.

Remember Norwich are down to 10 men.

Jermaine Jenas
Ex-Tottenham and Newcastle midfielder on BBC One

United were patient and it's a brilliant ball from Marcus Rashford to open the space and it's two good saves from Tim Krul.

United working it patiently...

...and almost grab the winner as Paul Pogba's low shot is kept out by the outstretched leg of Tim Krul.

The Dutchman gets up and then sprawls low to his right to palm out Mason Greenwood's follow-up.