Novak Djokovic has withdrawn from the Miami Open with a shoulder injury days after his defeat to Jack Draper at Indian Wells.
The 38-year-old, who looked , had set his sights on the Miami Open after losing in the final last year.
But the ATP Tour has announced he will be absent from the 15-day event at the Hard Rock Stadium with a right shoulder injury.
The withdrawal threatens his position as world No 3 with Germany's Alexander Zverev, who reached the semi-final in Indian Wells, set to overtake him in the ATP rankings.
Djokovic has won the Miami Open six times and was last year's runner-up, losing to Jakub Mensik. He has also made the final eight times.
The draw for the men's tournament in Miami will be made on Monday.
Following his defeat to Draper, who subsequently lost to Russian Daniil Medvedev in the quarter-final, Djokovic said: "He's been playing on a great level.
"I've watched him a little bit, had some highlights in Dubai that he has played there a few matches. And here, defending champion, he really likes the conditions and suiting his game. And you could see that.
"He's playing really well. He's confident and he was always confident and physically very fit."
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