Roma has one the worst defeat in early days of this season even few weeks back mostly peoples were feeling they are title race contender and in this match against Udinese they were better in all statics but sadly completely fail to convert any of their chance which is big setback for Mourinho and his team if they will take as lesson for them surely they are going to be had better results in coming matches because right now most of the teams at top in Serie A are struggling badly in quality as Inter, Juventus and now Roma but surely things will be clear soon.
Napoli and Atlanta are currently leading table even in last season these teams were at top and then slip most chances same results are going to have in this season as well because these teams fail to keep quality on same level which is big concern for them.
I did not expect such a terrible game in defense against Roma, which means Mourinho still failed to make Roma's defense so reliable as to be able to compete for the title. Udinese is not a top club, it's just an average club. However, Roma did not have any significant increase in the offseason, so it was not worth hoping that Mourinho could work a miracle. Atalanta took the lead, but you are right, Atalanta has always had problems with consistent results.