Tomas Berdych, Tommy Haas and Radek Stepanek are the first players to compete to the new event.
Reigning Roland Garros singles and doubles champion was named WTA Most Improved Player in 2021.
Linda Noskova, won the Roland Garros girls' title last June, is the youngest player in 13 years to qualify for the French Open.
The Spaniard is hoping to find his health - and fitness - ahead of Roland Garros.
Two French players are provisionally suspended pending investigation of corruption allegations against them.
Anastasia Pavlyuchenkova, the 2021 Roland Garros runner-up, has pulled the plug on her 2022 season.
The 40-year-old Spaniard had played every Grand Slam since 2002 Roland Garros.
