Djokovic out of US Open in shock loss

NEW YORK (AFP) -- Novak Djokovic suffered his earliest Grand Slam exit in 20 years Sunday and said he does not know how to solve the physical problems he has battled in "pretty much every match" this year. Argentina's Mariano Navone defeated Djokovic 7-6 (7-5), 5-7, 4-6, 6-2, 6-1, ending the Serbian's latest bid for a record 25th Grand Slam title. The loss also snapped Djokovic's streak of 78 consecutive first-round victories at Grand Slam tournaments, dating to his defeat by Paul Goldstein at t