Top-ranked Jannik Sinner beat Novak Djokovic in straight sets to win the Shanghai Masters on Sunday, giving the Italian his tour-leading seventh title of the season. The Italian bettered the 24-time Grand Slam champion 7-6 (4), 6-3 in an hour and 37 minutes and never faced a break point in the outdoor hard-court tournament. Sinner hit eight aces and 22 winners to four and 12, respectively, for Djokovic. Djokovic was aiming for his 100th tour-level title and his fifth in Shanghai. Only Jimmy Connors with 109 titles and Roger Federer with 103 have hit the century mark in men’s tennis. Sinner bec…