World No. 8 Tomas Berdych has announced his withdrawal from the 2016 U.S. Open with appendicitis. Berdych, who lost in the round of 16 at Cincinnati to Marin Cilic, says he is flying back to New York to undergo additional tests and treatment.

😞🤕... pic.twitter.com/6HgQib3Ihe

— Tomáš Berdych (@tomasberdych) August 20, 2016