I understand if you have a stretch of four tournaments in the same continent and they all use four different balls, it can be ...

The ATP is coordinating with the WTA to use the same balls as much as possible ... high level of play and a better product for the sport and our fans,” said Matthew Ebden, the president of ...

“If you have a stretch of four tournaments in the same continent and they use four different balls, it can be difficult and challenging,” said Casper Ruud after his opening victory over Carlos ...