Ten-man Atalanta reached sixth place in Serie A following a 3-0 home humbling of Palermo.In-form striker German Denis grabbed the opener in the 18th minute when smashing home Marten de Roon's rebound.The second goal came from Nicolo Cherubin, the defender heading the ball beyond Stefano Sorrentino from a corner in the 25th minute.Atalanta did lose Guido Migliaccio to a red card midway through the second half but quickly made amends as De Roon found Sorrentino's bottom corner with a left-footed screamer.Palermo - dumped out of the Coppa Italia by lowly Alessandria in midweek - enjoyed chances to respond through Ivalyo Chochev in either half but an eighth defeat of the season sees them fall to 17th.