Napoli coach Rafa Benitez was happy with his side's attitude in today's 0-0 draw at the Arena Khimki.
The Partenopei completed a 3-1 aggregate win after a goalless draw away at Dynamo Moscow.
But the Spaniard believes his side has to be "more mature" if they are to lift the trophy at the Stadion Narodowy in May.
"Playing away from home against such a quality team was not easy," Benitez told Mediaset Premium.
"But the approach and the intensity of the game were correct.
"We wanted to score a goal so as not to be under pressure in defence. The players know that in knockout games you cannot afford to make any mistakes.
"The intensity has always been there [in recent games], it was there against Lazio and also against Internazionale and Torino. Today all players worked extremely hard.
"We need a little bit of experience [to win the Europa League], the team has to be more mature and has to control games in a better way. Having said that, today we created chances and didn't concede goals, which is always a positive sign."
