Tiger Woods has no timetable for his return to competitive golf after confirming he will miss the Arnold Palmer Invitational.
The 14-time major winner's injury woes are ongoing, back spasms leading to his withdrawal from his last tournament - the Dubai Desert Classic in early February.
Just when Woods, 41, will return again is unclear, leaving a question mark over whether he will be fit to play the Masters starting April 6.
"Unfortunately, due to ongoing rest and rehabilitation on my back, I won't be able to play in this year's Arnold Palmer Invitational," the eight-time winner of the event, which begins March 16, said in a statement.
"I'm especially disappointed because I wanted to be at Bay Hill to help honour Arnold. This is one event I didn't want to skip.
Sadly missing the 2017 API. I really wanted to be there. My best wishes to the Palmer family & everyone at Bay Hill. https://t.co/xkbvfohcxA
-- Tiger Woods (@TigerWoods) March 9, 2017
"Arnold has meant so much to me and my family; I thought of him as a close friend, and Sam and Charlie were both born in the Winnie Palmer Hospital for Women & Babies. He will be greatly missed and can never truly be replaced.
"Presently, I have no timetable for my return to golf, but my treatments are continuing and going well."
Woods is without a tournament win since 2013, the former world number one's career stalled by multiple back surgeries.