Inter Milan coach Walter Mazzarri was left disappointed with their 2-1 defeat to Atalanta.
Giacomo Bonaventura grabbed the winner in the final minute with a free header from a set play at the back post.
"Clearly we just needed to mark the goalscorer and we wouldn't have lost," Mazzarri told Sky Sport Italia.
"We can't think to start the second half with four or five chances to put in the net and not score any of them.
"Atalanta could've scored earlier when Jonathan performed a goalline clearance. Atalanta are a good side and came here with no pressure, so it was obvious they could worry us.
"Inter had a great second half in which we threw everything at them, but we hit the woodwork repeatedly and I think we've done that more than anyone else this season.
"We practically gave away the first goal, then we gave away the second because of some poor marking. That's football, if you don't take your chances then you get punished."
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