Introducing the first tennis ball created by an ATP champion! Robin Söderling, after being asked which ball is the best on the market, and he just couldn't choose just one. So instead, he took matters into his own hands and developed the ultimate ball. And now, he proudly declares it to be the best one he's ever played with. During our testing we can say this is one of the best feeling balls we have ever used, it plays very soft and provides excellent feel for the user, while still maintaining excellent bounce. Those looking for outstanding durability should look to the Pro model.