Novak Djokovic’s shocking US Open loss looked like the inevitable beginning of the end

NEW YORK NEW YORK - AUGUST 30: Novak Djokovic of Serbia reacts during a changeover against Mariano Navone of Argentina during their Men's Singles First Round match on Day One of the 2026 US Open at USTA Billie Jean King National Tennis Center on August 30, 2026 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Julian Finney/Getty Images) | Getty Images The first day of this year’s US Open saw the tournament’s first major upset. Novak Djokovic, a four-time champion…