GameXplain: "As we mentioned in our review, Mario Tennis Open has one of the best soundtracks we've ever heard in a Mario sports game. And though we offerred a small taste in our review, we thought we'd collect the game's best music all in one place for your enjoyment. Stay tuned (heh) as we'll be updating the article with more tracks!"
That Galaxy rally one is really catchy.
this is sweet sweet music to my ears