Originally Posted by moby
If by revolution, you mean imitable change, and if that is a key criterion for greatness/etc, then Evert wins hands-down by popularising the double-hander. Yet she consistently played second-fiddle to Navratilova in the second half of their careers.
Well, yes. But this isn't about greatness. It's about generations being better than the previous one. Adding newer dimensions to the game is about that.
Evert's two-handed backhand allowed for more consistency on the backhand side. Navratilova added weight training and becoming an overall athlete not just a tennis player. Seles was the first player to hit with power on both wings and make full use of the graphite racquets. Williams sisters added new dimensions in offense and serve.
The generation after hasn't added anything and therefore, the game has peaked around early 2000s. There is nothing out there I haven't seen before. Whereas there was a huge difference between 2000 tennis and early 90s tennis.