World no. 1 Novak Djokovic is through to his 12th consecutive quarter-final in Dubai following a 6-3, 7-6 victory over Karen Khachanov in an hour and 38 minutes. Playing his second match of the season after skipping the Australian swing due to a visa controversy, Novak looks good on the court at one of his favorite tournaments, defeating both rivals in straight sets to remain on the title course.Djokovic toppled Khachanov for the fifth time in six encounters, continuing where he left against the Russian in Dubai two years ago and beating him for the fourth straight time. Novak made the difference with the first serve and saved three out of four break chances to keep the pressure on the other side.Karen lost serve twice and raised his level from the second set’ …