The best team won. It's sad and it's the end of an era for Arsene Wenger but it was the same old story, a soft goal cost them. Then they couldn't get back in it and the final ball wasn't good enough. This has been the story under Wenger for many years now.
In the early days Arsenal could win in any fashion - playing pretty football or beating you up. But now it's too few and far between and they do not have the substance at the back.