Tiger Woods has hinted that he may not be fit in time for the Masters this year.

The 38-year-old has struggled with a back injury since last summer and has only featured in three events on the PGA Tour so far this year, finishing just two of those.

With the Masters beginning on April 10, Woods admitted that his recent injury troubles had been "frustrating" for him, but insisted that it was too soon to tell whether he would be able to compete at Augusta or not.

"For Augusta, it's still a little too soon, to be honest with you. That's kind of the frustrating thing about this," Woods is quoted as saying by CBS Sports.

"I had a couple weeks off, was getting treatment and trying to get ready for Augusta. As of right now, it's still too soon. As I said, that's very frustrating."

Woods is a four-time Masters winner, last picking up the trophy in 2005.