#USOpen Throwback (2007): @serenawilliams and Vera Zvonareva left it all on the court in their third-round encounter, but it was Serena who came out on top in two tight sets. Send Serena a 🎾 if you want to see her compete in NYC next year! #usta #ustennis #serenawilliams #verazvonareva #serena #wta #tennis #protennis #instatennis #instasports