Walter Mazzarri made a winning return as Napoli coach on Saturday with the champions' hard-fought 2-1 victory at Atalanta, while AC Milan held on to third in Serie A after beating Fiorentina 1-0. Eljif Elmas netted the decisive goal 11 minutes from the end at the Gewiss Stadium in Bergamo after Khvicha Kvaratskhelia's headed opener for the away side on the stroke of half-time was levelled by a similar strike from Ademola Lookman. North Macedonia midfielder Elmas rolled home the winner from substitute Victor Osimhen's pass following Atalanta goalkeeper Marco Carnesecchi's poor clearance, making sure that Napoli stayed fourth.