Marouane Fellaini caused the Reds' defensive line untold problems. Full-back Leighton Baines has also drawn widespread praise this term for his performances.
But they're not the only Everton players Sir Alex's men will need to monitor on Sunday.
"[There's also] players like Pienaar, who’s been really good since he came back from Spurs. He’s actually improved since he came back from his short spell at Tottenham.
"Nikica Jelavic had a great season last season and is in a bit of a lull at the moment in terms of his goals. Now they’ve brought the big lad on, Victor Anichebe, and he’s a different player to Jelavic.
"You also look at the experience and consistency they’ve got at the back with Silvain Distin, Tim Howard, Phil Jagielka and Phil Neville. They play every week so they’ve got a good unit there.
"David Moyes has made gradual progress because when he first took over I don’t think he had any money to spend, I don’t think he had a squad anything like what he has now. Given time you can do these things and I think that’s a great value that Everton have got out of David – each year he has progressed to good levels.
"They’re challenging for a top-four place now. I think they have a genuine chance of being in the top four."