Cameroon's assistant coach has admitted that his side have not prepared for altitude ahead of Friday's critical Group B decider against Uruguay.
After two games in Cali, the Junior Lions play in the Colombian capital Bogota, some 2,600m above sea level.
"The altitude will affect us but Uruguay have also been in Cali so we both face the same situation," Englebert Nbarga told BBC Sport.
Cameroon must win to have a chance of exiting their Under-20 World Cup group.
After a draw with New Zealand followed by defeat against Portugal, the Cameroonians prop up Group B with just one point.
The Portuguese lead the way with four points, but with New Zealand and Uruguay both on two points, all four teams can still make it through.
The top two automatically qualify while four of the third-placed sides will also make the knock-out stages.
"It won't be very complicated to qualify because we just need a victory," Nbarga explained.
"We have to wait for the results of the other games, but you can qualify in third place - and with four points, that should be possible.
"We really need a victory against Uruguay and although it will not be easy, we can do it if we find some more confidence and more efficiency, both in attack and defence."
In both their matches, Cameroon have gifted goals to their opponents - scoring an own goal in the 1-1 draw against New Zealand before gifting Portugal their strike in Tuesday's 1-0 win.