Inter Milan coach Simone Inzaghi admits defeat to Juventus was "painful".
Adrien Rabiot and Nicolò Fagioli struck for Juve's 2-0 win.
Inzaghi said, "We had a very good first half and you cannot go into the break on 0-0 in this stadium after that kind of a performance.
“That is where the regrets are. We started the second half well too, hitting the crossbar with (Hakan) Calhanoglu and then conceding on the counter-attack. We lost our unity a little, still had the chances to equalise and then conceded again.
“It's a painful defeat in a big match against our competitor. This is football, perhaps last season we beat them without deserving it and clearly tonight 2-0 is an unfair result. Unfortunately, these matches are decided by incidents and we didn't manage to get them our way, so we have to do better."
He added: “We have to do more in these matches. We cannot fail to take the lead with the chances we create, it is all down to the details, because these matches are all on a razor's edge.
“We worked for four straight days after returning from Munich on how to deal with these counter-attacks, when to foul early to stop them developing, and both the Juve goals were gifted in those situations."