Grigor Dimitrov pulls out of the US Open with chest injury
Three-time Grand Slam semifinalist Grigor Dimitrov withdrew from the U.S. Open on Tuesday, a little more than a month after he tore a chest muscle and had to quit playing against Jannik Sinner at Wimbledon. That exit from the All England Club on July 7 — Dimitrov had taken the opening two sets against Sinner…