Tonight’s clash between Arsenal and Manchester United is the most eye-catching fixture of the fourth round.
For Unai Emery it’s the chance to edge towards winning his first trophy as Gunners boss, and for rival Ole Gunnar Solskjaer the chance to make it eight wins on the spin as Old Trafford chief.
Sir Alex Ferguson’s United and the Gunners enjoyed an intense rivalry during the striker’s time at the club, with the FA Cup semi-final win on the way to the 1999 treble particularly memorable.
“The semi-final in 99 is such an important game,” Solskjaer said of the match remembered for Ryan Giggs’ stunning solo goal.
“When Peter (Schmeichel) saves that pen from Denis Bergkamp, that gives us the advantage and we win the treble.
“If Bergkamp had have scored, they’d have won the double. That’s just how small the margins are, and I think that’s the standout for me.”
Arsenal will be looking for a repeat of their 2015 FA Cup win over United at Old Trafford, when former Red Devil Danny Welbeck netted in a 2-1 victory.
But how will tonight’s game go? And how can you watch?
What TV channel is Arsenal vs Man Utd on?
Tonight’s match is being broadcast by the BBC.
They go live on BBC1 at 7.30pm.
Host Gary Lineker is joined by pundits Alan Shearer and Danny Murphy.
Arsenal vs Man Utd kick-off time?
Tonight’s match gets underway at the unusual time of 7.55pm.
Arsenal vs Man Utd live stream
As tonight’s match is on the BBC, the game can be legally streamed in the UK in a number of ways.
Arsenal vs Man Utd can be watched online via the BBC’s website or the BBC Sport and BBC iPlayer App.
* PLEASE NOTE: You’ll need a valid TV Licence if you watch or record live programmes on ANY TV channel as it is a criminal offence in the UK to watch “live” television without a TV licence. This also applies to any device you use.