39-yr-old Djokovic wins 7th China Open title, seals singles title in 21st straight year. Twenty four-time Grand Slam champion Novak Djokovic won a record seventh China Open title after Australia's Alex de Minaur retired with a groin injury during the final on Tuesday. The 39-year-old extended unbeaten China Open record to 34 straight victories and secured singles title in 21st straight year. Djokovic now has 102 ATP titles, just one behind Roger Federer's 103.