Nigeria became the first team to reach the last 16 at the Africa Cup of Nations by beating Guinea 1-0 in Alexandria. The Super Eagles, who beat Burundi by the same score in their opening Group B game on Saturday, secured their place in the knockout stage thanks to Kenneth Omeruo’s second-half header. Guinea proved difficult for Nigeria to break down, but were unable to rescue a point as they had done in their first match against Madagascar. Leicester midfielder Wilfred Ndidi headed the game’s first chance just wide for Guinea from a corner, while Nigeria’s best moment before the break fell to Odion Ighalo, who fired an angled shot into the side-netting. Arsenal’s Alex Iwobi forced Guinea goalkeeper Ibrahim Kone into a fine save just after the hour mark before Nigeria broke the deadlock. Moses Simon whipped in a corner and Omeruo got in front of his marker at the near post to glance home the game’s only goal in the 73rd minute. Nigeria’s appeals for a penalty soon after were turned down when Ahmed Musa’s cross appeared to hit an arm in a crowded area. The Super Eagles play Madagascar in their final group game on Sunday, while Guinea must beat Burundi in their last match and hope other results go their way. Guinea’s Liverpool midfielder Naby Keita was forced out of the game due to injury with just under 20 minutes left. Topics Guinea, Nigeria, Kenneth Omeruo, Naby Keita, Wilfred Ndidi, Africa Cup of Nations, Guinea, Nigeria Samuel Kalu passed fit to face Guinea following health scare Guinea look to get back to winning ways on Africa Cup of Nations return Liverpool’s Naby Keita carried off injured in Guinea match Keita set to miss Champions League final but could be ready for Guinea Salah and Elmohamady score as Egypt defeat DR Congo Phil Neville feels England ‘want it even more’ with each game at Women’s World Cup FIFA opens disciplinary proceedings against Cameroon over England antics Terry: No one is better equipped to succeed at Chelsea than Lampard Leigh Griffiths scores on Celtic comeback in Austria PSG lay out Neymar demands as Barcelona rumours intensify Leeds United close in on Ecuadorian winger – report The 11 most memorable transfer swaps… and which club got the better deal Barcelona use legend to convince Matthijs de Ligt to sign for them Tottenham launch a bid for Fenerbahce youngster – report