New York, Aug. 25 -- Britain's Cameron Norrie advanced to the second round of the US Open today after American Sebastian Korda was forced to retire due to injury, bringing an abrupt end to a contest that had promised a high-quality battle.

The 23rd seed Norrie was leading 7-5, 6-4 on Stadium 17 when Korda, visibly struggling with his back and hip, signalled he could not continue. Sitting with his head buried in a towel, the 24-year-old American appeared devastated as his campaign ended prematurely in front of the home fans.

The opening set was a tense affair, with both players trading powerful baseline rallies. Korda began strongly, serving with pace and firing down a flurry of aces to keep Norrie under constant pressure. The Briton, howe...