Originally Posted by NickJ
Mike Sangster - who? i hear you cry....
To quote Wikipedia (so probably not 100% accurate I know) -
Sangster was renowned for his fast serve. His fastest serve was recorded at 154 miles per hour in 1963. This compares with the current world record of 155 mph set by Andy Roddick in a Davis Cup match against Russia in 2004. Although it was considered by many to be a world record at the time, Sangster's record remains unofficial since it was not timed with precise modern technology (Similarly, Bill Tilden had a serve timed unofficially at 163.6 mph in 1931). In order to return his serve, players had to retreat to the back of the court. In one match at the US Open, Rod Laver retreated so far back that he became entangled with the backstop netting."
He wrote a book called Cannonball Tennis! What's not to like!
How were those serve speeds measured? What was the range of error?