BBC News reports that 39-year-old Novak Djokovic lost to Mariano Navone in the first round of the US Open with a score of 7-6 (7-5) 5-7 4-6 6-2 6-1 on a Sunday night. This marked his first opening-round Grand Slam exit since 2006 after winning his 24th major title at the US Open three years earlier. Djokovic had reached deep runs at the Australian Open and Wimbledon earlier in 2024 before early exits in Paris and New York.