Doha [Qatar], February 25 (ANI): Karen Khachanov captured his sixth tour-level crown and the first of this season with a triumph at the Qatar Open by defeating Jakub Mensik in the final. In a heavy-hitting title clash, the 27-year-old outlasted Mensik 7-6(12), 6-4 at the ATP 250. After saving four set chances in the first set, Khachanov intervened on the 18-year-old’s second serve at 12/13, hammering home a forehand return to take the lead in the fourth game. In the first game of the second set, Khachanov capitalized on his momentum by breaking Mensik’s serve. For the teenager, who was playing…