Diallo then collided with an opponent and suffered an harm, forcing him to be stretchered off and changed by Chelsea striker Nicolas Jackson.
Within the closing phases, Cameroon halved the deficit when centre-back Castelletto rose the very best and powered a header past Mendy, from Olivier Ntcham’s cross, establishing a tense finale.
However after N’Koudou headed huge when offered with a golden alternative to stage it within the dying moments, Senegal went up the opposite finish and sealed the win by way of Mane, who steered house from Idrissa Gueye’s low cross.
Subsequent up for Onana and the Indomitable Lions is a Group C match in opposition to Gambia, as they await their first victory of the match within the Ivory Coast.