The Professional Tennis Players' Association (PTPA) and Tennis Australia (TA) say they are likely to reach a settlement in the "near future" in relation to the lawsuit filed against multiple governing bodies.
Earlier this year, the PTPA - co-founded by Novak Djokovic in 2020 with a goal of increasing player power - began legal action against the men's and women's tours citing "anti-competitive practices and a blatant disregard for player welfare".
In September, the four Grand Slams were added to the lawsuit.
A letter filed to the United States Southern District Court in New York says the PTPA and TA - which organises the Australian Open - are engaged in "substantive and productive bilateral settlement discussions".