Already considered some of the best balls on the market, the RS by Robin Soderling Black Edition Tennis Balls are sleek, durable, and high functioning. Developed by Robin Soderling, long time ATP World Tour title winner, this set of balls has lots of speed for those intense, professional matches. The felt on these balls is unmatched and the pressure will last long enough to easily complete your match. This ball has been used as major tournaments such as the Memphis Open and the Stockholm Open, and will soon be a staple on all tennis courts. With great feel and superior control, you are sure to play your best with these balls. These balls are both pro player, and ITF approved.