Italy captain Gianluigi Buffon wants fans to leave their "club colours" at home as Gian Piero Ventura's men attempt to overturn a first-leg defeat to Sweden and qualify for the World Cup.
Jakob Johansson's solitary goal in Solna on Friday gave Sweden the upper-hand in their play-off, setting alarm bells off in Italian football.
That result left the Azzurri on the brink of failing to qualify for the World Cup for the first time since 1958, coincidentally when it was held in Sweden.
Ventura has come under significant pressure as a result and is likely to lose his job should Italy fail to overturn the 1-0 deficit, but Buffon believes their support could give them the advantage and called for them to forget their club allegiances when they head to San Siro on Monday.