Tennis legend Rafael Nadal has announced his upcoming retirement from the sport after a glittering career in which he amassed 22 grand slam titles.

A passage from the Rudyard Kipling poem “If” is written on the wall of the players’ entrance to Wimbledon’s Centre Court. “If you can meet with Triumph and Disaster and treat those two imposters both the same,” it reads. Competitors can glance at Kipling’s writing before they take to the London grass.

One of Rafael Nadal's biggest on-court rivals is wishing him well into retirement. Novak Djokovic took to social media Thursday to offer his "respect"