We're more popular. Pay us more.
An apparently simple argument put forward by Novak Djokovic, one that seems to make both philosophical and financial sense. Why should female tennis players be paid the same as their male counterparts when fewer spectators want to watch them?
Except equal pay is as much a myth as it is a minefield.
While each of the four Grand Slam tournaments offers the same prize money for men and women (although it took Wimbledon until 2007 and the French Open until 2006, while the US Open had done so as far back as 1973) tennis does not reward its stars in anywhere near the same way.