Chelsea boss Thomas Tuchel admits goalscoring wing-backs are crucial to his system.
Tuchel says their importance cannot be underestimated.
"It's a very important position, the system that we play," said Tuchel. "Of course, a very important part of the position is to arrive in the box, and to create a goal threat from the position.
"This is what we want and what we demand. I'm happy that Chilly is scoring and reaching his full potential, and pushing limits constantly because it fits pretty perfectly his personal player profile.
"For Reece, you see sometimes he plays in the back-three but this means that I would not do this with Chilly. His character means he is not the type of guy to play in the back-three, he takes more risk and he is more free to arrive in offensive positions.
"For Reece, we have to encourage him to trust himself to arrive in the box and be dangerous because he can be a real threat, physically and actually also technically in finishing some fantastic goals against Arsenal and Norwich.
"The technical ability was brilliant and they need to feel it and understand the game, to have the responsibility to decide when to arrive or when they have to protect around the box.
"The more they understand then the more natural they become. The less they think about it, the better it gets."
While Ben Chilwell and Reece James receive strong praise from Tuchel, our German head coach is quick to share his appreciation for other players who play at wing-back under his tenure.
"I am happy with everybody, Marcos [Alonso] was very strong at the beginning, Chilly is now very strong, and Azpi and Reece are very strong at right wing-back.
"Callum made a huge step in the last game and took one for the team because everybody was out."
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