<b>Allnigeriasoccer.com </b>understands that CD Feirense attacking midfielder Oghenekaro Etebo is a major doubt for the Super Eagles World Cup qualifier against Zambia early next month. <br /><br />It is confirmed that the Nigeria U23 star will be unavailable for selection for a period of&nbsp; between two and three weeks after suffering an injury during training at his Portuguese club. <br /><br />Etebo sustained an injury after landing awkwardly on his right knee and an MRI scan has now revealed that he will spend at least two weeks on the sidelines. <br /><br />Having said that, the former Warri Wolves ace has started his rehabilitation and has began jogging. <br /><br />Whilst he is questionable for the crucial tie with Zambia on October 9, he will miss games against Boavista (September 18) and Nacional (September 24) in the Primeira Liga.<br /><br />Ifeanyi Emmanuel&nbsp; <br />