Caltex Socceroos defender Milos Degenek played a central role as Red Star Belgrade upset Liverpool with a 2-0 victory in the Champions League.
Milan Pavkov's first-half double fired the Serbian outfit to victory, with an inspired defensive performance keeping the Reds out on Wednesday morning.
Jurgen Klopp's men had over 70 per cent of possession but failed to register a shot on target until the 71st minute, with Degenek making a game-high five interceptions and three blocks.
The victory propels Red Star back into contention to qualify from Group C, although they remain bottom on four points.
Elsewhere, PSV's Trent Sainsbury came off the bench to make his Champions League debut, but the Eredivisie champions were unable to hold on to their early lead, eventually going down 2-1 to Tottenham at Wembley.
In the J-League, goalkeeper Mitchell Langerak also enjoyed a clean sheet as he led Nagoya Grampus to a 1-0 victory at Cerezo Osaka.