Williams is of course coached by Mouratoglou; while Gauff has been mentored by him since a young age.
There is also celebrities involved including DJ Bob Sinclar and famous fitness instructor Shaun T; who developed a new Insanity routine for those involved.
This all gears up to the new season for Williams and Gauff; who will both compete at the ASB Classic in Auckland.
https://twitter.com/MouratoglouAcad/status/1205976351901011968
https://twitter.com/pmouratoglou/status/1206703083100758017