Callum Wilson (Pic: GETTY)
The Sky Sports power rankings calculate the form of every single player in the Premier League.
Each player’s performance is assessed by a complex system which awards points for 33 different matchday stats.
These stats include goals, passes, tackles, blocks, big chances missed and touches.
Each action is worth more or less depending on whether the player is a goalkeeper, defender, midfielder or forward.
Pierre-Emerick Aubameyang (Pic: GETTY)
Only the last five weeks are taken into account and points from previous weeks are reduced by 20%, 40% and so on.
Manchester City are top of the league going into the derby with local rivals Manchester United tomorrow – and Raheem Sterling is the top dog at the Etihad right now.
His fellow wide forward, Anthony Martial, is the form man for the Red Devils – and the game could boil down to which of the duo maintain their performance lvels.
Ross Barkley has emerged as the key man at Chelsea in recent weeks, coinciding with a back injury to Eden Hazard which meant he missed one game and was used only as a substitute last time out.