i think the OP meant older not younger in this phrase - "10 years younger than his opponent".
we will see how far pacquiao is prepared for this yet another fight of his career. he has nothing to prove anymore. he is already a legend in boxing. what is there to gain for this fight anyway? more money? proof that he can still fight at his age? in any case, still interesting to watch this coming july...
Yes that's true Manny is 10 years older than his opponent and as far as I know that Pacquiao was trained according to their program and he loves boxing as his passion in life so I don't think Manny will be beaten easily , and if we try to analyze his last fight is not convincing to stop fighting.
So we will wait for their coming fight, and lets see if who will be the champions even if they have a age gap. But Pacquiao is so much to do hard training for his becoming fight and confident that he will defeat Thurman.