Costa Rica's victory on Thursday over Bolivia, which left the Ticos looking at a potential quarter-finals place, was tinged with sadness as they dedicated the triumph to defender Dennis Marshall, killed in a highway crash last month.
Marshall, who played for Danish side Aalborg, had only just returned to Costa Rica following the CONCACAF Gold Cup tournament in the United States when he was killed in the head-on crash with a truck.
"He showed courage and dedication on the field and so we are dedicating this win to him. He will be happy with this victory," said Joel Campbell, who scored one of the Ticos' goals on Thursday.
The Costa Ricans had lost their opening game to Colombia but now can go into their final match at Cordoba against wobbling hosts Argentina, who trail them by a point after two draws, with confidence under their Argentine coach, Ricardo La Volpe.
La Volpe said Argentinian fans would rejoice at his side's victory.
"Our win favours Argentina," said La Volpe, in that it means Bolivia are likely to come bottom of the group if they do not beat Colombia.
A Bolivian triumph would have put Colombia and Bolivia on four points and made life harder for the Argentinians.
"Mathematically this is a good result for Argentina - it wouldn't have been the same with a Bolivian win."
"With yesterday's (Wednesday's) result (between Colombia and Argentina) we knew we'd be in for a tough one against Argentina. They will surely have to beat us," La Volpe said.
Josue Martinez netted Costa Rica's opener on the hour and youngster Campbell scored a neat second with a fine drive
Bolivian keeper Carlos Arias saved a 71st-minute spotkick from Allen Guevara to keep the score down but the kick for handball earned Bolivian defender a red card and Walter Flores went five minutes later to leave the Andeans with just nine men for the final quarter-hour.