Napoli attacker Lorenzo Insigne was left frustrated after their 2-0 defeat at Europa League opponents Arsenal.

Insigne concedes a missed chance could prove a decisive.

"I am still thinking about that chance, because an away goal would've been important. I got there too stretched out, it went badly," the captain told Sky Sport Italia.

“We have to think about the errors we made and ensure we don't make them again, because we've got it all to do next week.

“We lacked some courage at the start, it was one of our worst performances of the season, but we need to focus and do it differently in the second leg.

“Arsenal are a great team, we saw that tonight and already knew before. Having said that, we had the chances to score and they were simply more effective with their scoring opportunities.

“We must play with the right determination and intensity next Thursday to turn this around."