While Western United and Sydney FC do battle on the pitch this Sunday, two passionate sets of active supporters will seek to out-do each other off it.
United's active supporters, the "Western Service Crew" and "The Cove" of Sydney FC will aim to out-sing, out-jump and out-do each other on the terraces at GMHBA Stadium.
Here's what you need to know.
Western United: Western Service Crew
The Western Service Crew has rallied behind their new A-League team.
It started with a handful of passionate "Westies" on a freezing night in Caroline Springs who watched the club’s first-ever game against George Cross, singing songs and banging a drum.
They've has since grown in numbers, noise, and colour, creating an electric soundscape wherever they go.
A sea of green and black can now be seen and heard at United’s home games, all in support of the west.
Sydney FC: The Cove
Sydney’s active support goes back to the beginning of the A-League and is one of the strongest and most well-organised of all in the competition.
In 2005, Australia’s most populated city had a new team and marquee signings like Dwight Yorke had a rowdy supporter group to go with it.
The Cove always brings noise and passion, but over time, has become known for their eye-catching pre-game "tifo" displays.
The artistic quality of The Cove's members is admired even by rival fans in the league.
The Cove has chosen Sunday's game as their "national service" travel day. Sky Blues fans have been encouraged to get to Geelong to support their side.
The contest on the pitch will be matched by the noisy battle off it. See you there.
WHAT YOU NEED TO KNOW
Western United's next home game is on Sunday, December 1 against Sydney FC at GMHBA Stadium. Kick-off is at 4.00 pm.
CLICK HERE to buy tickets.
CLICK HERE to become a Western United member.