Henman was picked up by the Slater Squad, a group funded by financier Jim Slater, at the age of 11. The main goal of the Slater Squad was to pick and coach young players from the ages of nine or ten, instead of 11 and 12 as the Lawn Tennis Association (LTA) did. The original intake for the squad was eight players between the ages of eight and 11. In addition to Tim, the squad consisted of Jamie Delgado, Gary Le Pla, Paul Jessop, James Bailey, Adrian Blackman, James Davidson, Marc Moreso. In the squad, Henman worked on tennis three hours a day: two hours playing tennis and receiving advice from Donald Watt, and the last hour on gymnastics and learning about the game. In contrast to popular belief, Henman was not considered the best of the bunch, and Sue Barker, the British 1976 French Open Women's champion, judged that there was "nothing particularly special in his game in those days". She notes, however, that while Henman did not have the natural skills of a tennis player, he was "a hard worker". None of his fellow players in the Slater Squad saw Henman as a potential British number one, with most believing Marc Moreso to be the group's brightest hope. Not long after becoming a member of the Slater Squad, Henman was diagnosed with osteochondritis, a bone disease. He was unable to play tennis for six months, and it was two years before he could return to tournaments. Luckily for Henman, Slater kept funding him while he was recuperating, because of insistence from Lloyd who believed in Henman's tennis abilities.