When I played Tennis in High school, I would have practice five times a week, four during the week, and one on saturday. Although, now that Im out of southern california, its hard to find tennis clubs or anything so I haven't played in awhile
I would have 2hrs 30mins of team practice, where we would do our doubles pracice, our running, and tennis drills, four times a week. Then we would rally with a partner for an additional 30mins after practice.
On saturdays, we (my sister and I) would do 1hr 30mins of tennis drills and such with and instructor and then for an additional 30 mins we would do light training with a medicine ball, foot work and such.
I could never turn pro. I wasn't allowed to play any sports until I got into high school, so I barely started tennis a couple of years ago. I just play for fun