Former world No. 1 Caroline Wozniacki tells reporters in Madrid that the game keeps evolving, for better or worse. "Everything changing all the time, like with cars," the now sixth-ranked Dane said. "You see new models and some of the newer ones are better than the older ones just a little, but sometimes it’s a big change and a big step forward. With the [tennis] equipment as well, I don’t know where it will be in 10 years, but maybe you will push a button and racket will play itself."