you can see the players used in the World Tour in the file Data\Players.ini .
And if you wish, you can edit and change them.
I have no idea what is a "Tournament Bracket". But you can see all the tournament draws, with the scores of all other played matches.
And yes, the rank of all of the 300 players in the game evolves every week, according to their results. You can consult the activity of every player and how much points he earns on every week (look there to see an example : http://managames.com/tennis/screenshot_en.html