Compare the great arm wrestling match with the match between Santiago and the fish. How are the matches similar?

Santiago thinks back to triumphs of his past in order to give himself more confidence in the present. He remembers a great arm-wrestling match he had at a tavern in Casablanca. It had lasted a full day and a night, but Santiago, El Campeon (The Champion) as he was known then, eventually won. "He decided that he could beat anyone if he wanted to badly enough and he decided that it was bad for his right hand for fishing" (70). He tried to wrestle with his left hand but it was a traitor then as it had been now.