Substitute Giovani Dos Santos scored twice in the second half to give Mexico a 2-0 victory over Gabon on Sunday in the men's Olympic football tournament. Dos Santos came on after the break and opened the scoring in the 63rd minute before converting a penalty in injury time at the City of Coventry Stadium. The win puts Mexico top of Group B with four points, while Gabon has one. Switzerland faced South Korea later Sunday in the second group game of the day. (For more sports news and updates, follow Ahram Online Sports on Twitter at @AO Sports and on Facebook at AhramOnlineSports)