#1 Marcos Alonso
He's a wing back who can do everything!
Note carefully, he's a wing back who can more or less do everything on the football pitch, not a full back. His time under Maurizio Sarri was different from when Chelsea played three at the back.
Marcos Alonso is rather slow in tracking back, and with only two centre-halves for Chelsea, there's a lot of space behind the Spaniard to run and exploit - an enticing sight for any top-class winger.
Alonso's finishing is top drawer material, and so is his work on the ball. Without it, however, he leaves the four-man defense in a lot of trouble whenever the ball is lost high up the pitch. Due to the same, the likes of David Luiz and Antonio Rudiger were forced to drag out of their positions.
Emerson meanwhile, is more resolute, and now in Ireland, the exciting Kenedy is training under Lampard as well. Kenedy is pacy, and is someone who can get into dangerous positions as well. Thus, Marcos Alonso might not be required.