佢地排名前嗰啲選手好似每年都規定要參加一定數量嘅賽事
Top fifteen singles players and top ten doubles pairs in the World Ranking will be required to play in all 3 Super 1000, all 5 Super 750, and 4 out of 7 Super 500 tournaments occurring in the full calendar year, making it a total of 12 mandatory tournaments. A fine of US$5000 per event will be imposed upon players/pairs who fail to play. (wiki)