Nasrullah Khan was a Pakistanisquash player and cousin to the famous Hashim Khan and Azam Khan. In 1966, he became coach to Ireland's Jonah Barrington, along with Azam Khan as Barrington's tactical advisor, helping Barrington to win his first of six British Open titles between 1967 and 1973. He also coached Angela Smith, the GB and England world star who became a legend herself in the ladies game ensuring that the sport was professional for women.
References
The Khan story. "The Khan story", August 2000, Accessed July 2007.
Jonah Barrington, "Barrington on Squash", published by Stanley Paul, 1973.