NÃ lson Marcos ( born 10 June 1983 ) is a Portuguese football player . NÃ lson Augusto Tomar Marcos ( born 10 June 1983 in Ilha do Sal , Cape Verde ) , simply NÃ lson , is a Portuguese footballer of Cape Verdean descent who plays for CA Osasuna on loan from Real Betis , as a right defender .