
Third seed Novak Djokovic moved into the semi-final at the French Open on Tuesday after grinding down a doughty Karen Khachanov in four sets.
It finished 4-6, 7-6, 6-2, 6-4 to the 36-year-old Serb who is seeking a third French Open title and a record 23rd crown in the men's singles at the four Grand Slam tournament venues in Melbourne, Paris, London and New York.