#2 Marcos Alonso
A player who has been brilliant since he signed for Chelsea in 2016, his place on this list may be surprising.
While he has excelled for the club in terms of goal scoring, assists, and a bit of defensive work, he achieved this as a wingback in Conte's 3-4-3 formation.
Sarri usually prefers a more conventional 4-3-3 formation (Faouzi Ghoulam played this role for him at Napoli) with the fullbacks tasked with bombing up and down either flank.
This is not a role that Alonso has excelled in as he is considerably slower than most modern-day fullbacks.
The risk of having him isolated against the many speedy wingers in the Premier League may be one too great for Sarri to countenance.
Emerson Palmieri is a player the Italian coach knows well from his Serie A days. The naturalized Italian is more mobile than Alonso and has experience of playing regular football in various formations at AS Roma; 3-4-3, 3-3-3-1 or 4-3-3.
He is better suited for the pace and hustle of the Premier League as a left-back in a flat-four backline than his Spanish counterpart.