Nigeria have one of the most potent attacks in African football but have struggled to score goals at the ongoing Africa Cup of Nations, netting twice in two matches.

Kenneth Omeruo who has become such an important player for the Super Eagles in Egypt scored off a corner kick to hand the three-time African champions a slender 1-0 win against Guinea on Wednesday.

Arsenal winger Alex Iwobi tested the goalkeeper from outside the box on two occasions while Oghenekaro Etebo and Odion Ighalo also had opportunities to break the deadlock before the game-winning goal from the Chelsea defender.

''I am not worried about the level of our attack because we had other opportunities to score. We had two nice opportunities to open the scoring in the first half,'' Rohr told reporters on Wednesday.

''If you remember our first goal (scored by Ighalo), it was for me one of the most beautiful goals in the tournament, the goal we scored the other day against Burundi, it was prepared.

''Against Guinea we scored from a set-piece, it's good for a coach to know that we can also score from set-pieces and corners. In the past we conceded goals from corners, if now we can score goals from corners I am very happy.''

The Super Eagles returned to the training pitch on Thursday to begin preparations for their next game against Madagascar.