#3 Willy Boly (Wolverhampton)
The Frenchman is the currently part of the Wolverhampton Wanderers squad which has shocked the Premier League this season. An excellent record against the top 6 and destructive performances against the mid-table clubs has proved, that the recently promoted side is here to stay in the Premier League for long.
Willy Bolly might be the first name chosen in the back-line for any game and is an instrumental part of Nuno Espirito's team. The 28-year-old has given strikers like Sergio Aguero, Mohamed Salah and Harry Kane a tough time this season.
Though Chelsea might be looking for a younger option for the center-back role, Bolly has an advantage over the other options in the list as he has proven himself in the Premier League and has good experience of what the league demands.
Even if he is able to play at his prime for the next 5 years, it is a win-win situation for the Blues.
Bolly is also useful during set-pieces, having scored 3 goals for Wolves this season even though he seems reluctant to go forward most of the times during open play.