Frank de Boer believes the ongoing feud between captain Mauro Icardi and the Inter ultras is having a negative impact on the club.
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Inter hosts Southampton in Europa League Group K on Thursday looking to end a run of three consecutive defeats in all competitions, the last of which – Sunday's 2-1 home loss to Cagliari – was played out amid a poisonous atmosphere at San Siro.
Argentinian striker Icardi infuriated Inter's Curva Nord ultras after claiming he made himself a "hero" among his teammates by standing up to one of the group's leaders after a 3-1 defeat to Sassuolo in 2014-15.