<b>Allnigeriasoccer.com</b> understands that the Nigeria U23s players are not adequately prepared for their Olympic Games opener against Japan at the Amazonian city of Manaus on Thursday, August 4.<br /><br />The squad did not train again on Tuesday, with uncertainties surrounding the exact time and date they will depart their training camp in Atlanta. <br /><br />The Samson Siasia-led side first skipped their workout on Thursday,&nbsp; before cancelling training sessions on Saturday and Sunday.<br /><br />Meanwhile, Nigeria&rsquo;s first opponents in Rio, Asian champions Japan, are in good shape and recently tackled strong opponents Brazil to prepare them for their meeting against the Dream Team.<br /><br />Colombia and Sweden are the other opponents Nigeria will face in the group stage of the Olympic Games.<br /><br />Ifeanyi Emmanuel <br /><br />Photo Credit : thenff.com<br />