Italy's top-ranked Jannik Sinner came back to defeat Nicolas Jarry from Chile 4-6, 6-3, 6-1, while Chinese player Wei Sijia cruised into the second round of the China Open here on Thursday.
World No. 1 Jannik Sinner has withdrawn from the Paris Olympics tennis tournament due to tonsilitis.
With this victory, the Italian tennis player became the highest-ranked Italian tennis player and achieved his career-best ATP singles Ranking of No. 2.
Italian tennis star Jannik Sinner qualified for the Nitto ATP Finals which will be held from November 12 to November 19.
The match finished at 2:49 a.m., which has also set the record for the longest duration US Open match ever played.
Right from the start, the 21-year-old Italian felt out of place with 14 double faults and managed to put just 46 per cent of first serves into play.
The top seed engineered a mid-match turnaround to roar back and seal a 5-7, 2-6, 6-3, 6-2, 6-2 victory against the 20-year-old Italian.
With the victory, Murray improves to 8-1 in first-round matches on the year. He next faces 14th seed Denis Shapovalov, who squeezed past lucky loser Ugo Humbert of France, 7-6(1), 6-3.
On a busy first day, 10th seed Denis Shapovalov of Canada will be in action against Germany's Philipp Kohlschreiber, while 22nd seed Daniel Evans of England is scheduled to take on Feliciano Lopez of Spain.
Jannik Sinner defeated Vasek Pospisil of Canada 6-4, 3-6, 7-6 (3) in the summit clash to win his first ATP title. Pospisil was also attempting to capture his first ATP Tour crown.
