Muscat would know what's coming. The 41-year-old has played in three grand finals, all hosted by Victory.
He said the gravity of the moment hits when Victory's signature tune is played as you walk out of the tunnel.
"Once we walk out and Stand by Me [plays and the crowd] are stood up, the hairs on the back of your neck stand up. You realise it's not just a normal game, it's a special occasion."
In the decider, both coaches have the chance to create A-League history. By the end of tonight, either Muscat will have become the first man to win the A-League as a player and coach, or Arnold will be the first to coach two clubs to the trophy.
The winning club will also join Brisbane Roar with a third A-League championship, the most of any club.
Victory and Sydney could not be split during the regular season, sharing two 3-3 draws in their last two matches.
A shared prize isn't possible tonight, when a penalty shootout will force a result after 120 minutes.
Arnold said previous meetings wouldn't count for much in the final but it did suggest fans of attacking football would enjoy what is coming.
"They're great going forward and we're the same. You've got to play to your strengths," he said. "We won't change anything. Melbourne Victory will probably do the same as it's what's made them successful."
Arnold was happy taunting his opposite from behind state lines, suggesting Victory would've hated playing at AAMI Park. In Melbourne, he struck a more conciliatory note.
"There's obviously some banter that goes on but it's the two best teams that are here. We've got to be at our best to beat them."
- AAP