Paul Scholes has unsurprisingly named Arsenal legend Patrick Vieira as one of his three toughest opponents, but his other two most difficult adversaries come as quite a shock.
It's of little surprise that Vieira ranks among Scholes' hardest foes as he was the leader and midfield general of the Gunners team which had such a fierce rivalry with United at the turn of the millennium, but other Premier League greats like Steven Gerrard and Frank Lampard haven't made the cut.
Instead, the other two to make the United legend's list were his former academy teammate Robbie Savage and the late Papa Bouba-Diop.
Scholes, who amassed 719 appearances, 152 goals and 25 trophies during his 19-years at Old Trafford, explained that they made the list as they were the ones he struggled playing his own game against the most.
"When I played central midfield I like to go into games thinking: 'I just want to have all the time in the world here, just nobody around me, just find a little bit of space and pass the ball around,' Scholes' told BBC Radio 5's Savage Social show last year.
"Then you play against people like you [Savage]. An absolute nuisance, trying to close you down dead quick. I don't want that, I just want it nice and relaxed.
"The way I played I didn't really have to beat people or be stronger, quicker than the other person.
"I suppose Patrick Vieira, you play against him, he is so long, he is so big. You think you've got the ball, and the next minute he nicks it over your head, he was a clever player as well.
"There's one more that people won't think of. We used to play against Portsmouth. Do you remember Papa Bouba Diop? Big, massive. They used to call him 'the Wardrobe.'
"You get involved physically with him and you're wasting your time. I always found him awkward to play against. He wasn't a Vieira, of course he wasn't, but he still had talent."
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