• Tiger Woods

Tiger Woods (Photo : Reuters/Matt Sullivan)

Four-time Masters champion Tiger Woods, 39, said on April 7, Tuesday, that he has been working hard for the past two months to prepare for his golf game comeback, ESPN reported.

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Speaking to the media prior to his 20th Masters, which will start on April 9, Thursday, Woods said, "People would never understand how much work I put into it to come back and do this again."

"It was sunup to sundown," Woods added. "And whenever I had free time; if the kids were asleep, I'd still be doing it, and then when they were in school, I'd still be doing it. So it was a lot of work."

Shortly before his comeback, Woods visited Augusta National twice. Working on his game, he spent much time at his home course in Florida, Medalist Golf Club.

This year, Woods has played only 47 holes and has not played since withdrawing during the first round of the Farmers Insurance Open on Feb. 5 and announcing a leave to work on his game including numerous short-game issues.

About the surgery he had because of his issues with his back, Woods said it was more frustration than anything else because he knew what he could do and just was not able to do it at the time.

On April 6, Monday, Woods was spotted greeting each other with an embrace after having not seen each other recently. The long-time friends were absent for much of the early 2015 PGA Tour season, according to CBS Sports.

On his comeback, Woods will start his 20th Masters with a match with Jimmy Walker and Jamie Donaldson.