Benoit Paire was defeated by Federer in AO 1st round last night. Commentators pointed out that Benoit's FH was a bit shaky and Federer peppered his FH side with 1st serves and pace off the ground. So, there's a simple case of a pro using strategy (or, at least tactics) even in an early round against a lesser opponent. Federer even hit a few approach shots to the guy's FH when he was position to approach on the BH. Paire didn't handle pace to the FH as well as he handled it on the BH. I seem to be in the minority but I think there is quite a bit of strategy/tactics on ATP. Yes, each player has their strengths and favor their strengths but game plans do vary.