Manchester City - Fernandinho
Even if a team possesses a plethora of attacking resources to choose from, the holding midfielder is just as important. That importance is even more when the team has just one reliable option.
Fernandinho has performed effectively as City's midfield anchor, starting all but two league games. He has provided solidity to Guardiola's backline and has instigated many forays forward.
Naturally, the likes of Sergio Aguero, Kevin De Bruyne, and Raheem Sterling grab the attention but the value of Fernandinho cannot be overlooked in City's record-breaking season.
Manchester United - Ashley Young
Young has reinvented himself at Old Trafford this season when it looked like he would be heading out of Manchester. He has made 17 starts in the league already, compared to the meagre total of 12 in the whole of last season.
The former Aston Villa man has been used as a utility player by Jose Mourinho. Young has slotted into the full back position on either side of the pitch as needed. His crossing, dribbling and expertise over the dead ball has not waned, as was exhibited by his brace at Watford. Young's professionalism and experience have turned him into a valuable asset for United.