"He's very confident that he's going to win. That's why he wanted this fight so much, because he feels that he can beat Pacquiao. He's younger, he's as fast [as Pacquiao] and he probably has better stamina than Manny does," Arum told. "[Juan Manuel] Marquez, you understand, has the language problems although he can speak some English. He was also confident. [Shane] Mosley was in there for a payday and he didn't say much. But this kid is a young lion who believes he can win the fight," Arum said.