Novak Djokovic was upset in the first round, 6-7, 7-5, 6-4, 2-6, 1-6, by the 25-year-old Mariano Navone at Arthur Ashe Stadium on Sunday night. Novak Djokovic crashed out of the US Open after suffering a shock loss in the first round. Key points and original sources are listed below.

• Novak Djokovic was upset in the first round, 6-7, 7-5, 6-4, 2-6, 1-6, by the 25-year-old Mariano Navone at Arthur Ashe Stadium on Sunday night.S1

• Novak Djokovic crashed out of the US Open after suffering a shock loss in the first round.S2