Napoli's problems continued when they were held to a 0-0 at home by Genoa in a tense atmosphere and jeered off the field on Saturday following a tumultuous week at the Serie A club.
The San Paolo stadium was barely one third full on a damp evening after a week in which the team defied orders from club owner Aurelio De Laurentiis confining them to a training retreat.
Players were greeted with insults as they warmed up on the pitch and there was near silence when the stadium announcer read out the Napoli line-up before the game.
Lorenzo Insigne thought he had put Napoli ahead after two minutes but Hirving Lozano was ruled offside in the build-up. After that, it was a lacklustre display from Napoli which further angered their supporters.
Napoli defender Kalidou Koulibaly prevented it from being worse for the hosts with a miraculous clearance off the line from Andrea Pinamonti's point-blank shot in the second-half.
Napoli, runners-up in three of the last four seasons, stayed seventh on 19 points, 12 behind leaders Inter Milan.
The issues at Napoli have spilled off the pitch as Allan's wife Thais hit out on social media after fans broke into their home.
The Brazil international has been named as one of the ring leaders behind the squad mutiny against a training retreat which has sparked anger among fans.
Allan's home has been broken into but nothing was stolen but items were thrown and damaged.
'ENOUGH!' wrote Allan's heavily-pregnant wife Thais on Instagram.
'I think now it is really getting out of hand and I cannot take it anymore. First my husband is attacked not for what he does on the field, but some alleged accusations created on purpose by someone who wants to distort reality…
'Then every day I get insulted on social media with disrespectful words. This week it even happened while I was out shopping.'