WIMBLEDON, England — Matteo Berrettini, last year’s runner-up at Wimbledon, dropped out of the grass-court Grand Slam tournament hours before he was scheduled to play his first-round match Tuesday, saying that he tested positive for COVID-19.
The All England Club announced Berrettini’s withdrawal, and he posted about it on Instagram, saying that he was “heartbroken” and has been isolating “the last few days” after experiencing flu-like…