Overview
- Chair umpire Greg Allensworth noticed a device on Jannik Sinner before his match with Luciano Darderi and required its removal.
- Sinner was wearing a Whoop bracelet that tracks heart rate, strain and recovery without a display, and he said he uses the data after matches and will not wear it on court again.
- Sinner complied without sanction, then beat Darderi 6-1, 6-3, 7-6 to advance to the Australian Open quarterfinals.
- Organizers have stepped up checks this event, with Carlos Alcaraz and Aryna Sabalenka also told to remove or stop using similar trackers.
- Whoop CEO Will Ahmed criticized the enforcement and claimed ITF approval, while officials pointed to rules in place since 2015 barring such devices during matches.