Change is always interesting in how it impacts people. Top athletes outside of their own performance will often look to blame something else out of their control. It absolutely could be that certain brands of balls benefit different styles of tennis players, in the same way that an aerodynamics change in an F1 car can be beneficial to one driver and not another.<p>What also makes a good sports person is their ability to manage this change and stay consistent. Some athletes can and others struggle to change their playstyle or whichever way you want to put it.<p>Interesting read but I do agree that there should be more consistency in the balls they use from tournament to tournament.