
Although conventional wisdom suggests tennis surfaces have grown steadily slower and more alike over the decades, recent research offers a surprising perspective on how the game has actually shifted. While historical rally-length graphs from the late 1970s onward indicate that exchanges across clay, grass, and hard courts have converged significantly—primarily driven by clay-court points becoming much shorter—ace-rate analysis tells a different story.
Analyst Jeff Sackmann examined court speeds using ace data and discovered that the relative speed ratings between fast and slow tournaments, such as Wimbledon and Monte-Carlo, have remained virtually unchanged across a span of more than thirty years.

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