Gianluca Lapadula scored twice as AC Milan won 4-1 at Empoli to move second in Serie A.
Roma were unable to keep pace with Serie A leaders Juventus after they were held to a goalless draw at struggling Empoli.
Joe Hart was at fault for Mauro Icardi's first goal as Inter Milan beat Torino 2-1 in Serie A on Wednesday.
Frank de Boer's future as Inter Milan head coach is under serious threat after a 2-1 defeat to Atalanta in Bergamo on Sunday.
Inter Milan were held to a 1-1 draw at home by Bologna in Serie A on Sunday after a fine volley from Ivan Perisic.
Mauro Icardi inspired a superb comeback win for Inter as they beat Juventus 2-1 on Sunday, while Roma lost at Fiorentina.
Inter Milan suffered a surprise 2-0 defeat to Chievo on the opening weekend of Serie A while Napoli also struggled.
Juventus celebrated winning the Serie A title for the fifth year in a row by beating relegation-threatened Carpi 2-0.
Hellas Verona beat AC Milan but Carpi's 1-0 victory over Empoli confirmed relegation from Serie A for Luigi Delneri's side.
Paulo Dybala scored twice as Juventus thrashed Lazio 3-0 to take what could prove to be a decisive lead in Serie A.
Liverpool target Piotr Zielinski has claimed he has held talks over a potential summer move to Anfield.
Napoli are back within six points of Serie A leaders Juventus after beating bottom club Hellas Verona 3-0 on Sunday.
Juventus moved six points clear at the top of Serie A with a 1-0 win over Empoli on Saturday.
Inter Milan scored two late goals to beat Bologna 2-1 at San Siro and move above Fiorentina into fourth place in Serie A.
Roma routed Palermo without Francesco Totti on Sunday, while Fiorentina kept pace in the Serie A title race.
Juventus moved above Napoli at the top of Serie A after Simone Zaza's late goal secured a 1-0 win over the Azzurri.
Gonzalo Higuain scored a late penalty to give Napoli a 1-0 victory over Carpi on Sunday and keep them top of Serie A.
Crystal Palace are bottom of the Europe-wide form table - and only one Premier League team makes the top 10.
Carlos Bacca and M'Baye Niang hit second-half goals as AC Milan beat Inter Milan 3-0 on Sunday.
AC Milan were held to a 2-2 draw by Empoli, while Frosinone and Atalanta played out a goalless draw on Saturday in Serie A.