Agency :
Novak Djokovic, playing his first tournament since his deportation from Australia, continued his fight to keep his No 1 ranking with a convincing 6-3, 7-6 (7/2) victory over Karen Khachanov in Dubai to move into his 10th consecutive quarter-final on Wednesday.
The Serbian top seed, who has not lost before the last-eight stage at any tournament since Monte Carlo 10 months ago, must at least reach the semi-finals in the Emirates to stand a chance of stopping Daniil Medvedev from replacing him at the summit of the rankings.
Medvedev is competing in Acapulco this week and is guaranteed to end Djokovic’s world No 1 reign if he clinches the title.
There are other scenarios however that could allow Djokovic to extend his 361-week at at the top, should Medvedev falter in Mexico, but the Serb must at least make it to the final four in Dubai.
Djokovic followed up his opening round win over Lorenzo Musetti with a fifth victory in six meetings with Russian world No 26 Khachanov.
The five-time Dubai champion needed one hour 38 minutes to overcome Khachanov and set up a quarter-final against Czech qualifier Jiri Vesely, who knocked out Spanish eighth seed and last week’s Doha champion Roberto Bautista Agut.
Djokovic was in action in front of a capacity crowd in Dubai that included his son Stefan and his former coach Boris Becker.
Djokovic went up a set and a break before Khachanov upped the pressure and struck back to level the second set at 4-4.
The Olympic silver medallist rallied the crowd behind him and swatted away a pair of break points to hang on to his serve but blinked in the tie-break to lose in straight sets.
Earlier on Center Court, Jannik Sinner stopped Andy Murray from joining the 700 match-wins club as the Italian fourth seed advanced to the Dubai quarter-finals for a second consecutive year with a 7-5, 6-2 success over the former world No 1.
Sinner had to save three match points in his opening win over Alejandro Davidovich Fokina but had a far simpler route to victory Wednesday, facing zero break points against Murray in their one-hour 43-minute second round.
The 20-year old Italian has improved his 2022 record to an impressive 9-1 and next takes on fifth seed Hubert Hurkacz.
