Three own goals were scored as Napoli's spectacularly inconsistent season continued with a 4-2 defeat at Empoli on Thursday.
Defender Miguel Britos was sent off for head-butting an opponent as Napoli lost 3-1 at champions Juventus on Saturday, all but ending their hopes of Champions League football next season.
Napoli's Manolo Gabbiadini netted a precious second-half equaliser to earn a 1-1 away draw at Lazio in the first leg of their Italian Cup semi-final on Wednesday.
Argentina's injured captain Lionel Messi has been named in a squad missing the suspended Javier Mascherano and Gonzalo Higuain for next month's World Cup qualifier against South America's bottom side Paraguay.
Lionel Messi announced on Friday that he wants to return to play for the national team, reversing his decision to retire earlier this year. Messi said in June that he would not play for Argentina again after the team lost to Chile in the final of the Copa America.