Napoli captain Kalidou Koulibaly says they must learn quickly after their Europa League defeat to Spartak Moscow.

Koulibaly admits Spartak's coaching staff were taunting Napoli during the game.

“It was a tense finale, because their assistant manager was winding us up during the break," Koulibaly told Sky Italia.

“I don't want to look for any excuses, we could've done much better. We lost this match and have much to learn. It takes a lot of work to win every single fixture.

“There's disappointment and regret, but we need to take it one game at a time. I think we were already thinking about Sunday's game with Fiorentina and that was a mistake. If we play with our minds elsewhere, we're going to struggle.

“This match taught me a great deal, on a personal level too. The coach was very disappointed, he told us before the game how we should approach it. From tomorrow, we must find the right focus for a difficult test against Fiorentina."