While Perth Glory will be underdogs to take down Manchester United in their friendly on Saturday night, midfielder Neil Kilkenny knows what it takes to spring an upset on the Red Devils.
Playing for Leeds United in January 2010, the Australian played the full 90 minutes as his then League One outfit stunned Sir Alex Ferguson's side 1-0 in the FA Cup.
Kilkenny faced off against the likes of Dimitar Berbatov and Wayne Rooney that day but still managed to leave Old Trafford an unlikely winner.
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Nine years later, the 33-year-old will once again tackle United, this time on his own turf, and will be hoping for an even bigger upset at Optus Stadium.