wow, just goes to show you how important leg and core strength is, especially in tennis. I've got a feeling my hips are pretty weak. How would one strengthen this area. I do squats and good-mornings, among other excersizes, 3 to 4 times a week. Is this sufficient enough training for your hips?
2x AG200 13.6 oz Blue Gear/Isospeed Baseline Spin
1x MW200g, 1x Mfil200g