Napoli coach Luciano Spalletti has warned Tanguy Ndombele after giving him a debut in victory over Monza.
Ndombele has arrived on-loan from Tottenham and saw action in yesterday's 4-0 win.
Spalletti said, "He is a player who can be thrown in, because he knows how to play football and knows all three positions because he also played behind the striker. He has quality, he can see beyond the first pass.
"He has the ability to always verticalize, but he must be able to do a lot of kilometers in a game.
"Because you don't play standing still, you need the willingness to sacrifice yourself for your teammates and that's what we expect from him."