Diede de Groot remains in a class of its own in wheelchair tennis. With her victory at the US Open last weekend, she has won all Grand Slam tournaments in one calendar year for the second time in her career. “The surprise may have faded a bit now, but it remains very special.”
Diede de Groot (25) seems unbeatable after ‘calendar slam’: ‘I know very well that I am not a machine’ | Tennis
