AC Milan twice squandered the lead as they were held 2-2 at Empoli in another disjointed Serie A showing from Sinisa Mihajlovic's side.

Inconsistent Milan have shown signs of progress in recent weeks and while they extended their unbeaten run to four games in all competitions, it was a result unlikely to ease the pressure on the coach.

Familiar defensive failings again undermined them as goals from Carlos Bacca and Giacomo Bonaventura were cancelled out by Empoli pair Piotr Zielinski and Massimo Maccarone.

The hosts could have overtaken sixth-placed Milan with a win but fell behind in the eighth minute when a long pass found Bacca who slammed the ball past Lukasz Skorupski.

Zielinski equalised in the 32nd minute after meeting an excellent threaded ball from Riccardo Saponara.

Milan then went back in front in bizarre fashion in the 48th minute when an Empoli clearance smashed M'Baye Niang in the face and the ball deflected into the path of Bonaventura who finished with aplomb.

Empoli were level again 13 minutes later as the ageless Maccarone finished from close range after Gianluigi Donnarumma parried a Manuel Pucciarelli effort into his path.

Milan now have 33 points from 21 games, two behind AS Roma, while Empoli stay eighth on 32.

In Saturday's early kickoff, struggling Frosinone missed an opportunity to end their seven-game run without a victory when they drew 0-0 at home against Atalanta who have not won in six.

The draw left Frosinone second from bottom, five points from safety. Atalanta are 12th on 26 points.

There are eight matches on Sunday with second-placed Juventus hosting Roma, leaders Napoli visiting Sampdoria and Inter Milan, who are third, entertaining Carpi.