Arsenal boss Mikel Arteta says his players have learned from last season's defeat to today's opponents Tottenham.
The two sides meet at the Emirates on Saturday, in what promises to be another highly-charged clash. But Arteta believes his side will not make the same mistakes again.
"It's a different context," he said.
"We went into that game with many different circumstances, in terms of players we had available, not available, what happened during the game.
"You take the lessons, you learn from it and you move on, that's it."
When asked if Arsenal had heeded those lessons, the Spaniard said: "Yes.
"Every defeat leaves a scar. It was a big learning point and hopefully the experience has made us better as a team.
"If you want to play in the Champions League then you have to be able to get through moments where the pressure is on.
"That day we didn't do it, from our side and from decisions that were made in that game."