Throughout 2013, the WTA has been celebrating its 40th anniversary and the progress over that time has indeed been remarkable.
Tennis is the biggest women's sport in the world and WTA chief executive Stacey Allaster expects more than 50 million people to watch this week's season-ending tournament across the planet.
Over the last three years, 200million US dollars has been ploughed into the women's game, and the WTA Tour stages 54 tournaments in 33 countries.
It is a far cry from 1970 when nine women, known as the Original Nine, set up the Virginia Slims Circuit as a protest against unequal prize money in the new Open era and a lack of opportunity.
Three years later, Billie Jean King gathered 63 players together at the Gloucester Hotel in London just before Wimbledon, locked the door and the WTA was formed.
Later in 1973, King beat Bobby Riggs in the Battle of the Sexes, which was celebrated this summer with a film.
In her state of the WTA address in Istanbul, Allaster said: "I'm in tennis, and I thought I knew the story.
"But I must tell you this year has been such an educational year for me personally to learn more about how hard it was to be a woman in 1973, how hard it was for Billie, and the weight of the world that she had on her shoulders and the significance of what a tennis match was where it did change the lives of women forever.
"Serena talked about Billie giving her and all the players an opportunity to play tennis. I truly believe, had it not been for the Original Nine, had it not been for Billie beating Bobby Riggs, had it not been for the 40 years of the WTA, there wouldn't be a chance for a Stacey Allaster, a female, to be a CEO of a world governing body.
"I just couldn't be more proud and more confident in the product that we have to excel women's tennis for this next decade."
The most recent milestone in the fight for equality came six years ago when all the grand slams paid the same prize money to men and women for the first time, but the feeling remains that it is in some ways equality in name only.
There is no going back from equal prize money and quite rightly so - what message would that send in 2013? - but it is an issue that bubbles under the surface and often spills out.
This centres on the format - best of five sets for men, best of three for women - but it is not too hard to find male players who feel their product is simply superior.
The scheduling at Wimbledon implies the same, with Centre Court and Court One usually staging twice as many men's matches as women's, and at the other combined events throughout the season it is a familiar story.
This era of tennis is, of course, a vintage one for men's tennis and not so much for the women's game, although Serena Williams could well finish her career regarded as the best female player in history.
The American's dominance is used as a stick to beat the sport with, yet only two or three years ago the women's game was criticised for lacking a clear number one while the men had a well-defined hierarchy.
What the men have had through an extraordinary last decade is big rivalries, and that has been lacking among the leading women.
Williams against Victoria Azarenka has promise and a close final between the two in Turkey would be a great way to end the season.
For the next five years, the WTA Championships will be held in Singapore and Allaster outlined some of the changes that will take place.
One that caught the eye was a proposed invitational event between the top young players on tour and Asian players.
In this area the WTA clearly has the advantage over the ATP Tour. The likes of Laura Robson and Sloane Stephens are already big names and Madison Keys, Eugenie Bouchard and Donna Vekic are poised to become so.
Meanwhile, there is not a single teenager in the men's top 100, and the next global stars to take over from Rafael Nadal, Roger Federer, Novak Djokovic and Andy Murray are far from obvious.