<b>Allnigeriasoccer.com </b>understands that CD Feirense attacking midfielder Oghenekaro Etebo has been ruled out of Nigeria&rsquo;s semifinal showdown with Germany at the Rio Olympic Games. <br /><br />The 20-year-old sustained a hamstring injury in the Dream Team&rsquo;s final Group B fixture last Wednesday, and medics have indicated that he will sit out his second straight game, having missed the quarterfinal clash with Denmark on Saturday.<br /><br />On Monday afternoon local time, Etebo did not take part in the Nigeria U23s first training session since their arrival in Sao Paulo. <br /><br />&nbsp;His place in the starting line-up was handed to Turkish - based frontman Aminu Umar in last weekend&rsquo;s tie with Denmark.<br /><br />Aside Etebo, assistant skipper Azubuike Okechukwu will not be available for selection against the Germans due to yellow card accumulation.<br /><br />Ifeanyi Emmanuel <br /><br /><br />