Cameroon's under-20 side has been reinforced for the ongoing African Youth Championships with the return of Alexandre Song.
Arsenal midfielder Alexandre Song returns for Cameroon's under-20s.
The midfielder who plays for English Premier League club Arsenal, rejoins after missing Cameroon's first-game 1-0 defeat to Egypt on Sunday.
Cameroon must defeat Zambia on Wednesday to progress from Group B to the second round of the competition.
Zambia also lost their first match of the tournament 4-2 to holders Nigeria.
Cameroon's coach feels Zambia will be worthy opponents for his side.
"It is absolutely nonsense to think that Zambia are the underdogs," Aboubakar told the BBC.
"Zambia played some great football against Nigeria on Sunday.
"Their football shows that the team has been training together for a long time and I will not be ignoring such a strength in an opponent," he added.