Napoli wing-back Christian Maggio admits dwelling on his miss against Champions League opponents Chelsea.

The winger had a great chance to make it 4-1 in the first leg, but was denied by an Ashley Cole goalline clearance.

"When there is an opportunity to score, you have to take it. It's a shame that ball didn't go in, as we could've increased our advantage," he told Sky Sport Italia.

"If we play the same way we did at the San Paolo, then we can have a great game in London too. They'll try to make it difficult for us, as they remain a great side.

"We are highly motivated in the Champions League, partly because at the start of the group phase everyone assumed we were done for.

"Instead, we reached the last 16 and can go into the quarter-finals. We try to face every Champions League game with the right spirit, then we'll see where we end up."