Uruguay won the only previous World Cup held in Brazil, defeating the hosts in the final in 1950.
Luis Suarez was the top scorer in the South American World Cup qualifiers (11 goals). He had the most shots on target in the last World Cup (15).
Diego Forlan has scored three of Uruguay's last five goals at the World Cup.
Costa Rica have lost their last four games at the World Cup, conceding 14 goals (3.5/game).
Veteran coach Oscar Tabarez has been in charge of Uruguay since February 2006, the longest period among the 32 head-coaches involved in this year's World Cup.
Uruguay have won six and lost none of their eight previous meetings with Costa Rica, most recently defeating them 2-1 on aggregate in a 2010 World Cup play-off.
Costa Rica have won their opening game in two of their previous three World Cup tournaments (1-0 v Scotland in 1990 and 2-0 v China in 2002).
Los Ticos have lost all three previous World Cup meetings with South American sides, conceding nine goals in the process.