Milan coach Sinisa Mihajlovic says his players have switched off after taking the lead against Torino in the second half.
The Rossoneri produced a very positive performance against Giampiero Ventura's men but allowed the hosts to restore parity with Mihajlovic blaming anxiety.
Milan keep their place in the middle of the table ahead of next week's home game against Sassuolo.
"It was not easy for us to come here tonight after two straight losses, but at a tough ground we played well," Mihajlovic told reporters.
"We dictated the play and the only disappointment was that we stopped playing for 10 minutes after taking the lead. We should have done better and anxiety set in.
"We have to be more decisive and manage our lead better. When they leveled the scores, we woke up again. The team did well tonight, but we should have believed more at times and taken shots on goal instead of opting for a pass.
"What I liked? We stepped things up a level tonight. Bertolacci did well and so did Montolivo. The formation can help, but it isn't decisive in winning matches.
"Perhaps with a 4-3-3 formation we were more solid, but we will see for the next matches. Today I was forced into some team decisions. Balotelli was out for instance and Bacca had barely trained with us because of the international break.
"I feel we've been a bit unlucky lately. Today, we gave away just two shots but conceded a goal. At Genoa, one shot and we conceded one goal.
"At Udine, two shots and two goals. Diego Lopez? Last season he was one of the best performers in the team, but this season he is having a few difficulties. He has all the qualities and experience to come out of this situation."