Another day, another win for Novak Djokovic . The tennis icon started the US Open on a dominant note after beating Learner Tien in straight sets, 6-1, 7-6(3), 6-2, at Arthur Ashe Stadium on Sunday.

Djokovic admitted after the match that he wasn't feeling great physically, but he still got the job done in yet another example of his resolute greatness.

He also made history by claiming his 75th straight opening win in a Grand Slam tournament. According to Opta Ace, Djokovic became the first player, male or female, in the Open Era to achieve the feat in singles main draws. Expand Tweet

It was the 38-year-old Djokovic's first match since losing to Jannik Sinner in the semifinal of Wimbledon last month. He had to shake off his rust early on against Tien, who was half his age. In the

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