Arsenal defender David Luiz was satisfied as his Gunners side secured a 1-1 draw against Manchester United at Old Trafford on Monday night.
United took a first half lead through Scott McTominay, before Pierre Emerick Aubameyang bagged a second half equaliser.
"We have to be happy with our performance. It is never easy to play here. It is not easy when you concede a goal [before half time] but after that it was a great game, a proper Premier League game, a proper derby," he told Arsenal.com.
"There is still a long way to go, we are trying to improve the team every week and I think we did a great game, and a mature game here. It is not easy to play with maturity here, but I think we did that tonight."