The WTA is calling for equal treatment of all tennis players and coaching to be allowed across the sport in the aftermath of the US Open final.
Serena Williams was given three code violations by chair umpire Carlos Ramos in her 6-2 6-4 loss to Naomi Osaka on Sunday, and critics inside and outside tennis argued that she was not treated the same as some male players.
The women's pro tour agreed.
"The WTA believes that there should be no difference in the standards of tolerance provided to the emotions expressed by men vs. women and is committed to working with the sport to ensure that all players are treated the same.
''We do not believe that this was done (in the final)," chief executive Steve Simon said in a statement.