Tennis is my passion. But also running, cycling, weight lifting and Pilates. I work out a lot - about 90 min a day 4-5 days a week, and I play tennis 3 days a week. But I try to keep a balance between strength, cardio and mobility.
I used to be just a runner with the odd strength session thrown in, and that was a recipe for injury for me.
And before anyone asks, no, I do not work full time.