Jannik Sinner avenged his defeat to Ben Shelton in the fourth round of last year’s Shanghai Masters with a 6-4, 7-6 (1) to spoil the 22-year-old American’s birthday on Wednesday. Like last year, the duel again featured some incredible shot-making and serving dominance but this time the 23-year old Italian prevailed to improve his record against Shelton to 4-1. “Happy how I handled this situation, it’s obviously a position where I have been last year, and where I am right now, it’s different, so I’m happy to be in the position where I am,” Sinner said.