i took a long break from tennis didn't play or watch it for 4 years. since the spring ive been back into it and loving it more then ever. but i do notice a difference in tactics. i remember 4 years ago i noticed among the top players that their was a lot of cross court exchanges. and not changeing stroke direction nearly as much. but now a lot of the players are mixing it up in terms of stroke direction. going crosscourt, then down the line, then cross court and down the line again. anyone else notice this? and why the sudden change?