Former world heavyweight champion “Iron” Mike Tyson says Manny Pacquiao, is not yet finished as a top-level boxer and a pay-per-view draw, reports ABS-CBNnews.com. “Well, Pacquiao is back. Because he fights Brandon Rios, and he sells the place out – he is back,” Tyson said. Pacquiao will take on Rios, a hard-hitting former world lightweight champion, this November in Macau. “When you’re not back is when you’re finished, and nobody wants to see your face no more,” Tyson explained.