Anthony Pettis will defend his lightweight title against Rafael dos Anjos . He is predicting a knockout win , but has hailed Dos Anjos' strengths . The UFC middleweight champion says he expects to be the first man in history to hold two belts at once and that it would take an extraordinary performance from him for anyone else to dethrone him. But the Brazilian will go into Saturday 's title fight as the underdog .
Anthony Pettis will defend his lightweight title against Rafael dos Anjos . He is predicting a knockout win , but has hailed Dos Anjos' strengths . Dos Anjos won his three last bouts including a KO of Benson Henderson . But the Brazilian will go into Saturday 's title fight as the underdog .