Sir: Featherweight, lightweight, even welterweight boxers are not required to fight heavyweights to prove their skill and courage.
In tennis, all are pitted against those blessed with overwhelming natural advantages. Although arguably professional tennis is more spectacle than sport - spectators, not participants, finance it - we are deprived of some of the most skilled, elegant and artistic performers simply because they are not physically capable of turning a racket into a sledge-hammer.
Why not a men's up-to-six-foot category and a six-foot-plus? Or something?