Super Eagles coach, Sunday Oliseh, is sweating on the fitness of Mainz 05 defender Leon Balogun ahead of tomorrow&rsquo;s eagerly anticipated African Cup of Nations qualifying fixture against Tanzania.<br /><br />The right - back sat out the 3 - 0 win over Football College Abuja on Wednesday and has not undergone full training with the national team since then, though he was considered for the trip to East Africa.<br /><br />Leon Balogun started and went the distance in Nigeria&rsquo;s 2 - 0 win against Chad in the opening Group G fixture back in June.<br /><br />Meanwhile, the rest of the squad had their final training session on Friday afternoon at the National Stadium in Dar es Salaam.<br /><br />Of the six times the 2013 African champs have faced Tanzania in the past, they have beaten the Taifa Stars on four occasions while they drew the remaining two games. <br />