Tiger Woods has revealed he pulled out of the Ryder Cup because he did not feel he could have won a point for the United States.

Woods, 38, last week withdrew himself from contention for the competition, which gets under way at Gleneagles in Scotland on Sep­tember 23, and has ruled himself out of any further action until Decem­ber as he attempts to get to the root cause of persistent back problems.

“Physically, I couldn’t do it,” Woods told Sky Sports of his deci­sion to inform United States captain Tom Watson he was unavailable.

“I wouldn’t be ready, and not be­ing able to be there for my team-mates, the captain and everyone that’s involved in the event, I just couldn’t help the team.

“When your name is called you have to be able to go out and get a point and I just didn’t feel like I could be ready enough to get that.

“With that being said, it was time to shut it down, get stronger, get more explosive again and get back for next year.”

The 14-time Major winner said he is working in the gym and does not plan to pick up a golf club for a month with nothing on his agenda until his own tournament, the World Challenge tournament at Isleworth in Orlando, Florida, in the first week of December.

“I’ve got to be physically fit when I come back so I’ll be explosive again and stable,” he said.

“Obviously, this year was frus­trating in that I didn’t really feel that I gave myself much of a chance. I first had that pain in my back and it would go away, and then it would come back, go away, come back, until eventually it never went away…It got fixed, but I took that fall on the second hole (at the WGC-Bridgestone Invitational) and I hadn’t done any agility training yet, so my hip got misaligned and every­thing went into spasm again.

“We got that all calmed down again but then I had to play. Now I need to keep it calm, then strengthen it and then I’ll be back. That’s one of the reasons I’ve shut it down. I’ll come back in December and be ready for next year.”

In 33 Ryder Cup matches over seven appearances, Woods has a record of 13 wins and 17 losses.