Defensive midfielder: Thomas Partey (Arsenal)
This is arguably the weakest position on the list, with no player from either side making a convincing case. But Thomas Partey gets the nod for his role in Arsenal's recent improvements.
The Ghanian is a crunch tackler and reads the game brilliantly, averaging 2.2 clearances to provide a strong protective screen for the back-four.
Right-winger: Jadon Sancho (Manchester United)
In the post-Solskjaer era, the United player who's impressed the most is Jadon Sancho, scoring in both their games since the Norwegian left.
He struck a fantastic goal against Villarreal in the Champions League before a sizzling counter-attacking goal against Chelsea last weekend. Can he now make it three in three?
Attacking midfielder: Bruno Fernandes (Manchester United)
Bruno Fernandes has taken over the creative mantle of the side to emerge as United's best playmaker with nine assists for the season, whilst weighing in with another four goals.
He's looked subdued in the last three games, failing to have any meaningful impact, but the Red Devils will hope to have the star at his creative best for tomorrow's big game.
Left-winger: Emile Smith Rowe (Arsenal)
The youngster has been a revelation for the Gunners this season, so much so that he even broke into England's national set-up last month and struck his maiden goal.
On the club front, Smith Rowe has five goals and two assists from 15 games in all competitions so far. He's developing into a potent threat with his line-breaking runs and eye for a pass.