Gonzalo Higuain scored in his fourth straight game on Wednesday to fire Napoli to a 2-0 home win over Palermo.The Argentinian put Napoli ahead with a 25-yard shot in the 39th minute.Higuain then saw his right-footed attempt on the hour hit the right post.The hosts were again denied by the woodwork in the 73rd minute when substitute Dries Mertens' 12-yard strike rattled the left post.Napoli finally doubled their lead 10 minutes from time when Allan set up Mertens in the box and the Belgian winger coolly struck past Palermo goalkeeper Stefano Sorrentino.The win, Napoli's fifth straight in Serie A, has lifted the azzurri to second place, two points adrift of league leaders Roma.ends