Jack Draper has pulled out of this week's Mubadala DC Open with an arm injury, tournament officials have announced.
It is the latest setback for the 24-year-old, who has been dogged by fitness issues throughout the year and missed the first three grand slam events.
The former world No. 4, who has now fallen to a ranking of 147, had been due to play American Alex Michelsen in the first round.
A statement on X read: "Jack Draper has withdrawn from the tournament with a left arm injury. He will be replaced in the draw by lucky loser Mackenzie McDonald."