Juventus defender Giorgio Chiellini says they must react to defeat to Fiorentina.
Chiellini admits Juve's poor record against their nearest rivals is becoming a concern.
"I think we need to reflect that in the most difficult away games this season, with all due respect to the other teams, we've had four losses," said Chiellini.
"I've been saying it for some time, we must improve.
"All that glitters is not gold, there is a lot of work to do."