Sudan on Thursday managed a slim 1-0 victory over Nigeria in a 2019 AFCON U23 qualifier.
A first half goal gave the host a three-point lead from the game played at the Al Merreikh Stadium in Omdurman.
Coach Imama Amapakabo had unleashed a strong attack led by Taiwo Awoniyi and Stephen Odey in his starting line-up.
But a cordinated defense by the Sudanese, denied Nigeria a chance to bounce back.
There is so much to play for, for the U23 Eagles on Tuesday in the return leg fixture scheduled for for the Stephen Keshi Stadium, Asaba.
Also read: Nigeria XI vs Sudan in U23 AFCON qualifiers