Nigeria international John Ogu has failed a late fitness test and has not been summoned by manager S&eacute;rgio Concei&ccedil;&atilde;o for the visit of Gil Vicente on Sunday, Academica&rsquo;s 16th fixture in the Primeira Liga this season.<br /><br />The central midfielder could not complete training on Wednesday afternoon after he picked up a knock.<br /><br />And though he now claims to be in good physical condition, S&eacute;rgio Concei&ccedil;&atilde;o has taken precautions by omitting him from the 20 - man roster announced on Saturday. <br /><br />&ldquo;Yes I had a knock on my ankle two days ago but I am back training with the first team,&rdquo; Ogu told <b>allnigeriasoccer.com</b> hours before the squad was announced.<br /><br />Ogu will not add to the six appearances he has made this season in the championship.<br /><br /><br />