FIFA has replaced the Colombian assistant referee whose incorrect offside decisions denied Mexico two goals in their 1-0 victory over Cameroon.
World football's governing body said Humberto Clavijo would not be part of referee Wilmar Roldan's team for the match between South Korea and Algeria in Porto Alegre on Sunday and would be replaced by Christian Lescano of Ecuador.
FIFA has selected Nestor Pitana, of Argentina, to referee the clash between the U.S. and Portugal in Manaus. He previously officiated at Russia vs. South Korea in Group H.
After beating Ghana 2-1, Jurgen Klinsmann's U.S. team could potentially advance from Group G with a point.
German referee Felix Brych will take charge of Belgium vs. Russia at the Maracana Stadium in Rio de Janeiro after having previously refereed Costa Rica's 3-1 win over Uruguay.