Injury is the pivot point. Team sports such as football, basketball, hockey have player unions that actively promote "owner accountability" for injury with just compensation when players are forced to retire due to injuries.  This pressure has led sports franchise owners to technologies which enable monitoring of motion and contact for best training practice and real-time risk evaluation, which is linked to insurance sharing this data. Best practices will attract lower premiums, higher risk methods will incur higher premiums.

Individual sports will follow the same regime.  Lower ranked players will risk injury more. As rank rises, insurance penalties and health/injury penalties will become more compelling disincentives.    Lastly, promoters will likely share liability for injuries to their tournament entrants.   For tennis, Turingsense.com is the point on the spear.  Top players have a pretty good idea how many swings they have in their career. Why wouldn't they use them wisely ?