Sudan international Nizar Hamid has been ruled out of the crucial African Cup of&nbsp; Nations qualifying tie against Nigeria due to an undisclosed ailment. <br /><br />His injury is a big blow to the manager of the national team, Mohamed Abdallah, who had planned to build his defense around the Al - Hilal star.<br /><br />So important is Nizar Hamid to the Sudan squad that he started all their four matches at the 2012 African Cup of Nations.<br /><br />Ahead of the game on Saturday, the North Africans have been fine - tuning their&nbsp; strategies by holding training sessions since Monday, sometimes in unfavourable&nbsp; weather conditions.<br /><br />Sudan have let in five goals in their first two matches in Group A, with four of&nbsp; them conceded in the second half, meaning they have a tendency to lose concentration.<br /><br /><br />Photo Credit : kooora.com<br />