Former Manchester City defender Nedum Onuoha says Kevin Keegan was an "incredible mentor" to him, having been handed his first-team debut by the Englishman after progressing through the club's academy ranks. Keegan, who spent four years in charge of the Citizens between 2001 and 2005, has died weeks after revealing he had been diagnosed with stage four cancer. "It wasn't just a debut for me because it was a life-changing moment," Onuoha told BBC Radio Manchester.