Cape Town - Nigeria coach Stephen Keshi thinks that his players have the capacity to build on the momentum gathered during the 2-0 victory in the Congo last weekend, reports Football411. Ahead of Wednesday’s Group A qualifying fixture against South Africa, the equation for Keshi and his Super Eagles is quite simple.A win will secure their passage to the 2015 Africa Cup of Nations tournament, while a draw could still see the defending champions advance but that will depend on the other result in the group."It was not an easy game against a very determined Congo side, but luck was on our side. We took a big step forward," Keshi told journalists ahead of the match against Bafana Bafana."Now we must do everything to get the three points in our last match and qualify for the Nations Cup," added a determined Keshi, who has not always been popular with the Nigerian football fraternity.The one complication for the West African giants ahead of the crunch clash is that they will be without the services of midfielder Hope Akpan (shoulder injury) and defender Godfrey Oboabona, who is ruled out through suspension.There is also the distinct possibility that defensive midfielder Ogenyi Onazi will not be available for selection because he did not train with the squad on Tuesday morning.The good news is that Kenneth Omeruoh is back and ready to play. He will certainly replace Oboabona at the heart of the Super Eagles defence with Soni Aluko likely to start on Wednesday.