Andy Lyons/Getty Images
By SI.com Staff
August 25, 2014

It was Mark Twain who once said, “Age is an issue of mind over matter. If you don't mind, it doesn't matter." And while it’s unclear if he was a tennis fan, Twain could have been characterizing the current state of the sport, as the average age of field has increased steadily in the last 20 years.

This will be thrown into particularly sharp relief at the U.S. Open today, when Venus Williams plays Japan’s Kimiko Date Krumm. Venus -- who last won the U.S. Open in 2000 -- is 34. Date Krumm is the oldest player on the women’s side (she turns 44 on September 28) and played in the tournament for the first time in 1989. From 15- to 43-years-old, check out the age breakdown of the players in the draw at this year's U.S. Open. 

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