Two wounded tigers are set to clash tomorrow (Saturday) and it will be interesting to see who comes out the victor.
One thing good about the game will be that Vidic is back from suspension and will surely shore up the defence. But whether Sir Alex uses him is a different matter all together.
Let's put it this way. With the Champions League match against Marseille coming up, Fergie must be thinking about whether he should play his first team or make changes. Massive changes.
There are a whole lot of other considerations, too. Arsenal are already out of the CL, and if MU kick them out of the Cup as well, that would mean Arsenal would be left to concentrate entirely on the league. And considering they are only three points behind, with a game in hand, this would not be good.
I suspect Fergie will bear this in mind when he chooses his team. He will not just give it up, of course, but you can still expect Fergie to make some changes.
There are rumours that Antonio Valencia may be in the team tomorrow. He's been back training for several weeks now and may find himself on the bench. It's good to know he's on the way back soon, but I hope Fergie doesn't rush him back too soon. The Gaffer himself admitted that Valencia has been missed. I can't argue with that. He was a great buy.
Ferdinand is still out, so Smalling should see himself still in the first team, unless Fergie decides to save him for Marseille. I expect Fabio will be called in to give Evra a rest, and O'Shea to play at rightback.
As for the middle, I think we'll see Fletcher and Gibson in the mix. Giggs and Scholes will likely not play, so expect maybe Obertan and/or Bebe in there.
Up front, I think Chicharito and Berba or Rooney will lead the attack.
News out of the Emirates is that Fabregas remains out, as do Walcott, Song and Vermaelen. Szczesny is also out after dislocating his finger or something like that. Van Persie is set to captain the side.
Don't expect Wenger to field a light side. He'll be looking to get the FA Cup after losing out on both the Carling Cup and Champions League. And he'll be looking for a psychological edge over MU in the run-in for the league title by beating them in the FA Cup.
It's way too close to call this one whether or not you know the teams both sides are fielding, but if Fergie chooses to field a weakened side, there may be no joy for him tomorrow. And, I'll get a ribbing from my big boss!