The Women's Tennis Association (WTA) has committed to securing equal prize money at events where both men and women feature by 2027.
The governing body will increase the number of WTA 1,000 tournaments - the highest level of competition outside of the Grand Slams - to 10.
Seven of the 10 events will be played over two weeks by 2025.
It will also aim for equal prize money at non-combined events, such as one-week WTA 1,000 and 500s, by 2033.
The WTA says the move will ensure the "consistent presence of the top athletes at these premium events".