FIFA U-20 World Cup 2011 – Round of 16

9 August 2011
Argentina – Egypt 

Referee: Markus Strombergsson (SWE, photo)
Assistant Referee 1: Fredrik Nilsson (SWE)
Assistant Referee 2: Magnus Sjoblom (SWE)
Fourth Official: Robert Schorgenhofer (AUT)


Portugal – Guatemala
Referee: Djamel Haimoudi (ALG)
Assistant Referee 1: Ayman Degaish (EGY)
Assistant Referee 2: Foaad El Maghraby (LBY)
Fourth Official: Noumandiez Doue (CIV)

Cameroon – Mexico 
Referee: Wilson Seneme (BRA)
Assistant Referee 1: Emerson Carvalho (BRA)
Assistant Referee 2: Alessandro Rocha (BRA)
Fourth Official: Walter Lopez (GUA)

Colombia – Costa Rica
Referee: Mark Clattenburg (ENG)
Assistant Referee 1: Simon Beck (ENG)
Assistant Referee 2: Stephen Child (ENG)
Fourth Official: William Collum (SCO)

10 August 2011
Nigeria – England
Referee: Antonio Arias (PAR)
Assistant Referee 1: Carlos Caceres (PAR)
Assistant Referee 2: Milciades Saldivar (PAR)
Fourth Official: Dario Ubriaco (URU)

Spain – Korea 
Referee: Mark Geiger (USA)
Assistant Referee 1: Mark Hurd (USA)
Assistant Referee 2: Joe Fletcher (CAN)
Fourth Official: Cuneyt Cakir (TUR)

Brazil – Saudi Arabia
Referee: Peter O'Leary (NZL)
Assistant Referee 1: Ravinesh Kumar (FIJ)
Assistant Referee 2: Jackson Namo (SOL)
Fourth Official: Istvan Vad (HUN)

France – Ecuador 
Referee: Kim Dong Jin (KOR)
Assistant Referee 1: Lee Jungmin (KOR)
Assistant Referee 2: Yang Byoung Eun (KOR)
Fourth Official: Abdulrahman Abdul (QAT)