Novak Djokovic's battling victory under the lights of Arthur Ashe Stadium made him the oldest man to reach the last 16 at the US Open.
Novak Djokovic reached the Wimbledon quarter-finals for the 16th time but it proved a hard day's work at his Centre Court office.
Defending champion Jannik Sinner dismissed eighth seed Alex de Minaur 6-3, 6-2, 6-1 to reach the Australian Open semi-finals and extend the country's decades-long wait for another homegrown singles winner at the Grand Slam on Wednesday.
The 20-year-old will need all of his weapons on Friday if he is to stand a chance in his first meeting with Djokovic.