Just happened upon this: Ken Rosewall won the first rounds of his last 3 tournaments in Oct. 1980. He was 46 years old and hadn't played a tournament in about 10 months. He beat John Fitzgerald (on grass), Tim Wilkison (indoor carpet), and the big-serving Butch Walts (indoor carpet) who was top 50 at the time. Amazing that a semi-retired 46 year old guy could still be one of the top 50 or so players in the world. As I've said before, the true greats would be the greats in any era.