The German hardman turned up in WWII uniform with an Adolf-style moustache, while departing Socceroo veteran Tony Vidmar dressed up as his nickname 'God' but with his face blackened.

Banned Olyroos keeper Danny Vukovic reportedly turned up at the fancy dress party as partyboy Corey Delaney.

The FFA have now launched a probe after an outcry from religious groups.

CEO Ben Buckley branded the outfits 'stupid' and told Sydney's Daily Telegraph: "Such behaviour is not only stupid, but is also not tolerated by the FFA.

"Our policy is clear. Any conduct that threatens, disparages, vilifies or insults another person, or group of people, on the basis of that person's race, religion, age, colour, descent or national or ethnic origin is abhorrent to FFA, whether on or off the field."