A tough loss for sure, as Napoli controlled the first 70 minutes of the game before Atalanta was able to exploit the gaps in the defense. But I was particularly pleased to see Mertens' actions in the first half. He goes down under no contact with the GK and when he turns to look at the referee, not to complain about a lack of a call, but to shake his finger as a way of saying it's wasn't a foul/penalty. So I was particularly happy to see him get his goal later in the half.