On the eve of the final return, Reghecampf showed his temerity by declaring his intention to win the trophy in front of his club's home fans on Sunday morning (AEDT).

"I think that tomorrow the spectators are going to be happy," he said through a translator.

There was not a backward step amongst his proclamations, delivering a clear message to Al Hilal fans.

"I cannot promise anything except for only one thing," he declared.

"I promise them that we are going to win this cup."

His brash attitude is in contrast to his team's performance in the first leg.

Tomi Juric scored the solitary goal at Parramatta Stadium to give the A-League side a narrow 1-0 lead ahead of the return.

Asked to consider the alternative; that despite the massive edge in wealth and history, Al Hilal could lose to the upstarts from Western Sydney, Reghecampf replied: "No, I promise you we don't lose tomorrow.

"We will see that and I hope (Western) Sydney will stay a small team."

The former midfielder was enjoying playing to a local crowd, with more than 65,000 frenzied fans expected to attend the final.

Dressed in the full-length white thobe, with the traditional red cloth gutra and black cord on top, Reghecampf made fans of the local journalists.

They clapped his arrival and many of his bullish answers, with one local reporter choosing to pay tribute instead of posing a question to the coach.

"I want to thank the coach for wearing these clothes," he said via a translator.

"It's a message from him to the supporters that this cup is for Arabians."

The aviator sunglasses the Romanian added on top was a neat metaphor for his confidence.