New Delhi: Novak Djokovic delivered his sharpest performance of the fortnight when he dispatched Jan-Lennard Struff in straight sets to return to the US Open quarter-finals. After grinding through back-to-back four-set battles earlier in the tournament, the Serbian looked far more comfortable under the lights of Arthur Ashe Stadium as he won the match 6-3, 6-3, 6-2 in just one hour and 49 minutes. This victory marked his fourteenth quarter-final entry at Flushing Meadows.

It was a relief for Djokovic after a tricky first week where he dealt with both difficult opponents and some physical issues. The 24-time Grand Slam champion again required treatment from ATP physiotherapist Clay Sniteman, who worked on his........

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