Newly-crowned US Open champion Jannik Sinner admitted on Sunday that the controversy over his two failed drugs tests “was and is still on my mind”. 

Italian Sinner, 23, defeated Taylor Fritz in straight sets to win his second Grand Slam title to add to his first in Australia in January. However, his path to victory was accompanied by questions over him twice testing positive for the banned substance clostebol in March. He escaped a lengthy ban when the International Tennis Integrity Agency (ITIA) found he was not guilty of wrongdoing after he had been inadvertently contaminated by his physio. The Italian sacked physio Giacomo Naldi and trainer Umberto Ferrara, citing a loss of confidence in them.