India, March 19 -- Simmering fissures in the tennis world have been cracked wide open with a lawsuit filed by the Professional Tennis Players' Association (PTPA), co-founded by Novak Djokovic, against the various governing bodies of the sport which they accuse of running professional tennis as a "cartel".

Facing heat over the perceived preferential treatment to world No.1 Jannik Sinner in his doping saga, the ATP (it runs the men's tour) has now been taken to court alongside the WTA (women's tour), ITF (International Tennis Federation) and ITIA (International Tennis Integrity Agency) over various governance issues. The lawsuit, filed in New York federal court on Tuesday with a dozen current and former players as plaintiffs, also mentions...