"We were beating a record of clean sheets, but managed to gift a goal within three minutes, so nobody needs to talk about that anymore," joked Mazzarri on Sky Sport Italia.
"Palermo were pressuring us and we held out, then for half an hour after the restart did everything right except the goal.
"We used up a lot of energy to go for a win and I moved to a four-man defence, but Palermo were fresher and we risked defeat at the end.
"It was a tight game and one incident could send the result one way or the other. I know what I need to tell the lads and where we can improve, but it was tough and I accept the result.
"The Vidic error was like the ball going through a goalkeeper's legs - it happens once in 100 years. He is a very experienced player, but these things can happen to anyone.
"We pegged Palermo back for long periods and tried everything possible, but were unable to get the goal and could even have lost at the end.
"We are Inter, we have to go to every stadium aiming to win and with that attitude you can risk a defeat too."
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