Tennis civil war erupts with details of initial peace deal revealed for first time

• PTPA had launched lawsuit against four grand slams

• Djokovic says he still has issue with PTPA leadership

The civil war engulfing tennis has been laid bare on the opening day of this year's first grand slam event, with details of Tennis Australia's peace deal with the Professional Tennis Players' Association (PTPA) published for the first time.

The PTPA launched an anti-trust lawsuit against the four grand slams, the ATP Tour, WTA Tour, and the International Tennis Federation last year, accusing them of collaborating to reduce prize money, impose a restrictive ranking system and repress player promotional opportunities, but Tennis Australia was dropped from the claim last month after reaching a settlement agreement with the players' union.