The first time I played FFX, I lost that game, and the second time I played FFX, I won it.

It is a little more difficult to win that match, as most of your Auroch original players pretty much suck, except for Tidus. You just have to get used to Blitzball to win that game. A little practice, and you'll pull it off.

After that, you can sign whoever is a free agent, stack your team, and go undefeated.