Russian tennis player Karen Khachanov has ended his partnership with coach Vedran Martic. The two worked together starting when Khachanov was 15 years old. Their professional relationship spanned many years with some breaks in between. The athlete stated that they both decided it was time to move forward. This change comes as Khachanov holds the rank of Russia's third-best player. He is now looking for a new direction in his training. The split appears to be mutual and amicable.