Sabalenka 'does not understand' Australian Open fitness tracker ban

Data analytics is a key part of elite sport performance and tennis players routinely have the screenless tracking bands on their wrists. They are allowed on the ATP and WTA tours, but not at Grand Slams. "The reason why I was wearing that on court, because we received the email that we got approval from the ITF to wear this device," she said, referring to the International Tennis Federation. "I didn't know that Grand Slams didn't come to (the same) conclusion. "I don't understand why, because the whole year we are wearing...