Uruguay missed the clinical finishing of convalescent Luis Suarez when they beat Northern Ireland 1-0 in a World Cup warm-up.
Suarez, England's Footballer of the Year after a brilliant season for Liverpool, is recovering from knee cartilage surgery eight days ago that put his presence at the Brazil finals in doubt.
He has been given a 50-50 chance of making it to the tournament in the 23-man squad coach Oscar Tabarez must name by Monday night's deadline.
Uruguay are in a tough Group D along with fellow former world champions Italy and England, plus Costa Rica.
Meanwhile Chile beat Egypt 3-2 in another international friendly in Santiago.
