Jannik Sinner's secret weakness that could cost him Wimbledon title

Jannik Sinner has been identified as having a specific weakness that hampered his performance at Roland-Garros and could now prove costly at Wimbledon. The Sporting News article suggests this vulnerability, while not explicitly detailed in the excerpt, affected Sinner during the French Open clay-court Grand Slam. As Wimbledon approaches, analysts believe this same issue could prevent Sinner from claiming the grass-court title.