All three decisions were criticised by TV commentators, but waved away by Japanese referee Yuichi Nishimura.

Wanderers players, who returned to a heroes' welcome at Sydney Airport late on Monday night, admitted they had enjoyed the rub of the green in the second-leg stalemate - particularly surrounding penalty claims, involving Ante Covic and Anthony Golec, either side of half-time and a later claim in which Brendan Santalab appeared to handle the ball in the box.

It seems the anger has not yet subsided, with the club insisting it was denied six fair penalties across the two-leg final - two in the first leg at Parramatta and four in Riyadh.

The dramatic upset led to ugly scenes immediately after the match, with Al-Hilal striker Nasser Al-Shamrani appearing to headbutt and later spit on Wanderers defender Matthew Spiranovic.

"Al-Hilal's management stressed that president Sheikh Salman Al Khalifa should bear the responsibility and stop the blunders that were witnessed in the two matches," the statement read.

"[Decisions] that appeared suspiciously and tarnished the reputation of the AFC, which raised many questions about the AFC Championships and the integrity and fairness of its competitions, and the need to ensure the absence of any effect of betting offices scattered among football by assigning the competent authority in the Asian Confederation to start investigating seriously."

Nishimura's controversial World Cup performance earlier this year, in which he awarded a widely criticised penalty to host nation Brazil in their opening match, was also referenced by Al-Hilal.

"It is surprising to appoint a referee for the second leg who was deported from refereeing in the last World Cup as a result of his mistakes during the tournament as well the end of his refereeing career at the end of this game," the statement continued.

"What happened in the second leg of the AFC Champions League final is a black spot in the history of Asian football, and looting of the right of an entire people who has been waiting for happiness and enjoyment of fair competition."