#1 N'Golo Kante
N'Golo Kante is undoubtedly the best defensive midfielder in the world right now, and after his heroics in the World Cup he has become hot property in the transfer market as Real Madrid, FC Barcelona, and PSG have been linked to him.
The Frenchman is deployed as a defensive protection to Chelsea's back-line and he has been consistently and effectively excelling in that role.
The former Leicester City midfielder covers a lot of ground, and it always looks like Chelsea are not playing with eleven men but twelve when he is on the pitch. Such is the quality of the World Cup winner.
Last season, in his absence Chelsea struggled a lot as their defense did not have the usual protection from Kante. At the age of 27 Kante is very close to peak form and Chelsea must keep him if they want to challenge for major honors.