Perth Glory midfielder Neil Kilkenny has already beaten Manchester United once before, and he hopes to experience it again this Saturday night.
Kilkenny was part of the Leeds United team that dumped Manchester United out of the 2010 FA Cup in the third round with a shock 1-0 win at Old Trafford.
It was United's biggest upset FA Cup loss since they were dumped out by Bournemouth in 1984.
Leeds were ranked 42 league positions below Manchester at the time, but Jermaine Beckford's 19th-minute strike was enough to seal victory.
Kilkenny played the entire match against a United side featuring the likes of Wayne Rooney, Gary Neville, Dimitar Berbatov, Michael Owen, and Ryan Giggs.
"It was a fantastic day. We made a lot of Leeds fans happy that day," Kilkenny said.
United will start as the hottest of favourites against Glory at Optus Stadium on Saturday night.
But Kilkenny is daring to dream of an upset, and is urging his teammates to enter the match with a winning mindset.
"It's a big club, but at the end of the day it's still a football match," Kilkenny said.
"You need to try to enjoy it and try to show you're a good player.
"When I've played big clubs before, if you go in with the mindset that you want to draw or avoid a big loss, you're going to lose.
"Every game you have to go in with a mindset of winning."
With Diego Castro still on holidays and Andy Keogh overseas at his brother's wedding, Kilkenny is in the running to be named captain for Saturday's match.
Glory will also be without Dino Djulbic (knee), Matthew Spiranovic (holiday) and Chris Ikonomidis (shoulder) among others.
With Perth missing so many frontline players, Popovic has been forced to draft a host of youngsters into his squad.
They include his two sons - 17-year-old Kristian, and 15-year-old Gabriel.
With unlimited substitutions and benches set to be available for both sides, the two Popovic kids could get some minutes against the most famous club in the world.
United's squad touched down in Perth on Monday afternoon, with the future of Paul Pogba dominating headlines.
Pogba has been linked with a move to Real Madrid or Juventus.
That speculation was further fuelled by an apparent spat between Pogba and teammate Jesse Lingard during a stroll through Perth on Monday.
Up to 10,000 fans turned out to Manchester United training at the WACA ground on Thursday evening, with the players treated like rock stars.