"We had control of the game in the first half and part of the second," said the boss.
"I'm disappointed because we had chances to kill the game. It's a problem when you have a situation on 83 minutes and you make a mistake. You pay for it.
"For me we had plenty of situations in and around the box and should have made more of them. The entrance of Aguero gave more depth to their play and we defended worse.
"If you'd said to me before game that we'd have seven points at the end of it then it would be good. But after leading until the 83rd minute, and when you consider the chances we had, then I think we have lost two points."