NEW YORK (AP) – Novak Djokovic walked into Arthur Ashe Stadium for the U.S. Open final Monday wearing a cap adorned with the New York City fire department logo.

Shortly before taking the court for his match against Rafael Nadal, Djokovic switched over to his traditional white cap.

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The men’s final was originally scheduled for Sunday – the 10th anniversary of the Sept. 11 attacks – but was moved to Monday after two days of rain washed out play at Flushing Meadows last week.

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The date “9/11/01” remained stenciled in white on the side of the show court, as it had been through the weekend.

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