AC Milan midfielder Massimo Ambrosini has warned teammates their top four chances still hang in the balance.
Defeat at Napoli could again see Milan tumble out of the Champions League places and Ambrosini said: "The spirit at Milanello has changed compared to last week.
"We are finally masters of our own destiny again, but we can't let that distract us. The difficult thing now is to make sure that we don't feel too satisfied and that we keep our concentration up.
"This Sunday's game against Napoli is crucial for us. In Naples there will be a cauldron-like atmosphere because it is their last home game."
Although he is keen to look to the future, Ambrosini can't entirely archive his delight at beating the Nerazzurri.
"There is still a great feeling of joy," he beamed. "It was so important not to lose the derby for a whole list of reasons. We managed to do even more win deservedly. The nervous ending was better because it made us appreciate the result even more.
"Now we need to ensure that the derby is a point of departure, rather than arrival."