The top 20 men's and women's players have sent a letter to the four Grand Slams asking for more prize money.
The letter, which was first reported by French newspaper L'Equipe, requested a meeting to discuss players receiving a greater share of the revenue generated by the Australian Open, French Open, Wimbledon and US Open.
World number 11 Emma Navarro cited "unfair pay ratios" as a reason for putting her name to the letter.
"I talked a little bit to the other players about it and felt like it was a good idea to sign", the 23-year-old American said on Wednesday.