New York City FC veteran Andrea Pirlo says Chelsea must fight to keep hold of manager Antonio Conte.

Pirlo rates his former Juventus coach among the best managers in the world.

He told Gazzetta dello Sport: “His attention to detail is impressive.

“He also manages to give you convincing explanations about things.

“One of his 20-minute video sessions is worth three days on the training ground.

“You immediately understand what it is you have to do.

“Over the year he improved, with his desire to win and doing everything to the best of his ability.

“He is one of the best, absolutely."