NEW YORK :Ben Shelton returns to Flushing Meadows with newfound confidence after claiming his biggest title and a career-high ranking two years after his charmed run to the U.S. Open semi-final. Shelton outlasted Russian Karen Khachanov 6-7(5) 6-4 7-6(3) in a tough fight to secure his first 1000-level trophy in Toronto and hopes that the win will kick start a new level of consistency in his game. "It's certainly going to push me to work harder," he said. "I feel like I have a good grasp now on