But of course. Current politician & former Pakistani captain Imran Khan's uncle. The very elegant opener Majid Khan's father. This anyway should have given you the hint.
Agree it's difficult to quantify. I regularly played basketball & badminton once upon a time and I have played a grand total of 4 hours of tennis. Though I sucked at it, I didn't find it physically that tiring. Found badminton to be the most physically exerting sport: lots of rallies in a very short period of time. But a single game (equivalent of a tennis set of 15 or 21 pts depending upon the old/new scoring system) rarely lasts more than 12-15 minutes unlike tennis or basketball which can last anywhere between 45 minutes to an hour and a half.