Kirani James, a 400m gold and silver medalist at the last two Olympics, will miss the world track and field championships in London in August.
James is recovering from an illness, the Grenada track and field federation president said Thursday.
The 24-year-old Grenadian last raced April 28, when he finished sixth at the Drake Relays in his slowest final time in nine years. James said afterward that he wasn’t injured or fatigued.
James could have been the biggest threat to Rio champion Wayde van Niekerk at worlds.
He posted the fastest 400m times in the Rio heats and semifinals before Van Niekerk surged to a world-record 43.