Tennis faces a new crisis of perception despite following its own rules on integrity. The two-tiered resentment is not going to fade away.

Sinner, the men’s world No 1 who won the Australian Open last month, twice tested positive for the banned substance clostebol last March. He was initially cleared of wrongdoing by the International Tennis Integrity Agency (ITIA) after proving he had been contaminated by his physiotherapist, and faced no ban from the sport.