These Tennis Clothes Serve — On and Off the Court

Old Navy High-Waisted PowerSoft 7/8 Leggings ($35, originally $50)

Whether it's cooler outside or you just prefer leggings to shorts or skirts, this purple pair offers a welcome update to your basic black. They've got over 16,000 five-star ratings, and even though the pockets are big enough to accommodate a phone or tennis ball, they won't sag down with the added weight.