Group B of the men's football tournament at the 2012 Summer Olympics took place from 26 July to 1 August 2012 in Cardiff's Millennium Stadium, Coventry's Ricoh Arena, London's Wembley Stadium and Newcastle's St James' Park.
[1] The group contained Gabon, Mexico, South Korea and Switzerland.
[2] In the quarter-finals,[3] Assistant referees: Bechir Hassani (Tunisia) Sherif Hassan (Egypt) Fourth official: Juan Soto (Venezuela) Assistant referees: Humberto Clavijo (Colombia) Eduardo Diaz (Colombia) Fourth official: Raúl Orosco (Bolivia) Assistant referees: Matthew Cream (Australia) Hakan Anaz (Australia) Fourth official: Ravshan Irmatov (Uzbekistan) Assistant referees: Efraín Castro (Bolivia) Arol Valda (Bolivia) Fourth official: Bakary Gassama (Gambia) Assistant referees: Abdukhamidullo Rasulov (Uzbekistan) Bakhadyr Kochkarov (Kyrgyzstan) Fourth official: Gianluca Rocchi (Italy) Assistant referees: Martin Wilczek (Czech Republic) Antonín Kordula (Czech Republic) Fourth official: Mark Clattenburg (Great Britain)