What can you infer?

At the end of the story, the narrator says that Felix and Antonio "would always be champions to each other."

You can infer that this means that the boys will always think highly of each other.

"Antonio danced in carefully. He knew Felix had the habit of playing possum when hurt to sucker an opponent within reach of the powerful bombs he carried in each fist."

You can infer from this passage that Antonio knows Felix's fighting style.

"We both are cheverote fighters and we both want to win. But only one of us can win. There ain't no draws in the eliminations."

You can infer from this passage that both boys want to win, and they know that only one of them can win.

"Antonio danced, a joy to behold. His left hand was like a piston pumping jabs one right after another with seeming ease."

You can infer from this passage that he moves gracefully and punches fast.

"They looked around and then rushed toward each other. A cry of alarm surged through Tompkins Square Park."

You can infer from this passage that the crowd thinks that the boxers are going to fight brutally.