Ignazio Abate admits AC Milan's performance wasn't good enough after their 0-0 draw at home to Bari.
The midfielder said: "I'm very disappointed, as are all the players, we could have done more. Now we must get our head down to work better, already starting on Wednesday.
"When we face teams like Bari, we must be more aggressive, but last night they did more, this should not happen. On the field it is up to us to find the right way to play."
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