AC Milan coach Massimiliano Allegri insisted he was calm despite his side's 1-1 draw at Lecce pegging their lead at the top of Serie A to just four points.

The draw meant Milan have now won just one of their last four league matches, picking up five points.

That has allowed all their major rivals except Juventus to gain ground on them.

Over the same period Roma have moved four points closer while both Napoli and Lazio have gained two points.

Only Juve, who picked up a point less in their last four games, have lost ground.

But perhaps the team that Milan will most be concerned about is cross-city rivals Inter who have won four straight games under new boss Leonardo -- who coached Milan last season -- including three in the league.

Inter are still down in sixth place but with two games in hand and if they win both they would be Milan's closest challengers just three points away.

"There's no alarm because for example (last week) we played Udinese who are in great form and we conceded three counter-attacks in the second half with individual errors," said Allegri.

"Lecce however never got close to our box. I was pleased with our attitude and we finished with a bang just as we did against Udinese.

"Over the whole season there are moments in which you drop points and the others gain ground but we're still four points clear of second place and even more than that ahead of the rest.

"There's still 20 matches left (sic. 18) and we'll work with those who we have at our disposal."

Milan had taken the lead through a wonder strike from Zlatan Ibrahimovic but Ruben Olivera equalised with a crisp finish on the turn at a corner.

Allegri complained that his players weren't marking the right players or areas.

"Lecce had made three substitutions and so the marking had changed. We needed to pay more attention but we didn't and we were punished," he said.

"There was a mistake on the goal with (Gennaro) Gattuso who should have been marking and (Clarence) Seedorf who should have stayed in a zone."

Seedorf also felt that the team had failed to get forward enough to put Lecce under pressure.

"In the second half we were doing better and trying to create something up front," he said.

"Personally I knew that I had to work harder to get into the box more because they kept it very tight.

"For sure in the first half we didn't get many bodies into the box."

And Seedorf said Milan must be wary of a resurgent Inter.

"As long as we're top we need to stay calm, the desire to win is there," he said.

"Inter's resurgence could take away some of our lucidity but I'm convinced we'll get back on track."