If you walk or bike to the tennis courts, a backpack can be a more comfortable (and versatile) option than a racket bag.
Wilson's Team Backpack is a great compact choice for players who need space for one-to-two tennis rackets, a change of clothes and a few other pieces of gear. Use the slip-in pockets on the side for water bottles or ball cans.
Versatile, commuter-friendly bag that you can bring along wherever you go.
