Napoli captain Marek Hamsik admitted frustration after their 0-0 draw with Champions League opponents Dynamo Kiev.
It means Napoli still need a point to reach the last 16.
“We were a little tired," confessed the captain to Mediaset Premium.
“It was not the usual Napoli and that's a pity, because with a victory tonight it would've been easier to qualify.
“We are top of the group and a point in Lisbon will be enough, but we have got to do better than this evening."