Watch the TAR matches and you can watch both players warm up before the match. Most of the matches are 9&10 ball with a few 14.1, 1-hole, and 8-ball for the the pain in the asses that insist on PMO.
Being most are 9&10-ball most players practice their break until they feel they found the right speed and place to break from. After that most see what each pocket will take and how much they can cheat it and get away with it. Then the usual things. Shoot down rails, check table for any roll-off, and how the rails are banking. Johnnyt