FIFA U-20 World Cup 2011 – Quarter-finals

13 August 2011
Portugal – Argentina
Referee: Peter O'Leary (NZL, photo)
Assistant Referee 1: Ravinesh Kumar (FIJ)
Assistant Referee 2: Jackson Namo (SOL)
Fourth Official: Kim Dong Jin (KOR)

Mexico – Colombia
Referee: Cuneyt Cakir (TUR)
Assistant Referee 1: Bahattin Duran (TUR)
Assistant Referee 2: Tarik Ongun (TUR)
Fourth Official: Markus Strombergsson (SWE)

14 August 2011
France – Nigeria 
Referee: Dario Ubriaco (URU)
Assistant Referee 1: William Casavieja (URU)
Assistant Referee 2: Carlos Pastorino (URU)
Fourth Official: Wilson Seneme (BRA)

Brazil – Spain 
Referee: Walter Lopez (GUA)
Assistant Referee 1: Hermenerito Leal (GUA)
Assistant Referee 2: Gerson Lopez (GUA)
Fourth Official: Mark Geiger (USA)