Having initially accepted a wildcard, Andy Murray announced he will not play at Delray Beach ahead of the Australian Open.
Play Academy with Naomi Osaka, backed by Laureus, has been launched with the aim of keeping girls in sport and improving quality of life.
Seventeen-time grand slam champion Novak Djokovic says a new ATP rule will prevent him from returning to the ATP Player Council.
Australian Open players will serve 14-day quarantine periods in Victoria that permits them to train for a maximum of five hours per day.
The Australian Open will now go ahead from February 8-21 following the ATP Tour's announcement on Wednesday.
Roger Federer said winning a major Swiss award on Sunday may prove a perfect "end point" to his career, yet he still hopes to play again.
Plans for the 2021 Australian Open are close to being finalised, tournament director Craig Tiley said.