Novak Djokovic became the oldest man in 34 years to reach the fourth round of the US Open on Friday night, overcoming lower back issues to defeat Cameron Norrie 6-4, 6-7 (4), 6-2, 6-3.

Not since Jimmy Connors’ straight-sets victory over Karel Nováček in 1991 has a man older than 38 years and 99 days claimed a third round win at Flushing Meadows.

Djokovic’s win also means that he has now overtaken Roger Federer for the most career wins at hard-court grand slams in history, with 192, while the pair are also now tied on 69 for the most grand slam fourth round appearances in the Open Era.

“I’m as young as ever, as strong as ever,” Djokovic joked in his on-court interview after the match.

In truth, Friday’s victory was not that simple. Up 5-3 in the first set, the Serbian began exp

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