CD Feirense attacking midfielder Oghenekaro Etebo is a huge doubt for Nigeria&rsquo;s quarterfinal clash against Denmark at Rio 2016 on Saturday after suffering a hamstring injury in the loss to Colombia on Thursday morning. <br /><br />The Dream Team VI poster boy will undergo a scan when the team arrives in Salvador to discover the extent of his injury, and if he would be available for selection in Nigeria&rsquo;s remaining games in the competition. <br /><br />&ldquo;The initial diagnosis indicate that&nbsp; Etebo suffered a hamstring injury, he will do a scan when they get to Salvador to know the extent of the injury, &rdquo; a top source told <b>allnigeriasoccer.com</b>.<br /><br />In the closing minutes of the encounter against Colombia, television images showed Etebo stretchered off and Siasia could not replace him because he had used his three substitutes. <br /><br />The 20-year-old has started three games at the Rio Olympics, scoring four goals against Japan.<br /><br />Ifeanyi Emmanuel<br />