#2 Pulisic, Willian, Morata

Lets make one thing clear, there is no way Pulisic would play on the left unless Hazard is injured, rested, or suspended...or maybe....sold!
Assuming Hazard is rested, Pulisic's natural position is on the right, so playing on the left could be overwhelming for the youngster.
More so as Chelsea dictate their game down the left wing with either of Ross Barkley or Mateo Kovacic in the midfield, and Marcos Alonso in the left back position.
The youngster would have a lot of responsibility on his shoulder should he be played in this position. And for the rumoured price tag of £70 million, the club and fans would want results right from the start.
But if the club is willing to wait and have faith, the player could develop and open up his game with time.