Stefano Pioli denied his substitutions were to blame but acknowledged Milan had messed up after Roma snatched a 2-2 draw in a dramatic finish to their Serie A clash at San Siro.
Having watched Napoli go eight points clear at the summit by beating Sampdoria earlier on Sunday, Milan looked set to cut the gap once again as goals from Pierre Kalulu and Tommaso Pobega put them in command.
However, Roger Ibanez halved the deficit with Roma s first shot on target in the 87th minute, before Tammy Abraham pounced on a rebound from a stoppage-time free-kick to rescue a point.
The remarkable finale saw Milan fail to win a Serie A match when 2-0 up after 85 minutes for the first time since 2009, leaving Pioli stunned after the Rossoneri dominated the contest.
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