Tiger Woods has checked into a Florida rehabilitation center in order to keep shared custody of his two children after his 3am DUI arrest last month, it has been claimed.

The golfer is said to have booked out the entire male inpatient unit at The Jupiter Medical Center for 28 days to be treated for 'pain killer addiction'.

Radar Online cites an anonymous source who said the stint aims to settle the concerns of his ex-wife Elin Nordegren.

The pair have shared custody of daughter Sam, nine, and son Charlie, eight, since their 2010 divorce but, according to the friend, part of their agreement was that Woods was to avoid any public scandal in order to keep his share.

If he breaks it, he could see his time with the children cut by 20 percent - leaving them with Elin 70 percent of the time and giving him just 30 percent.

Woods' arrest on May 29 has prompted her to consider applying for full custody of the children, they claimed.

The Jupiter Medical Center declined to comment on his reported stay on Monday and lawyers involved in negotiating his custody agreement with Nordegren did not respond to requests.

Woods' long-term agent Mark Steinberg also declined to address the reports.

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Tiger Woods is said to have checked into rehab in a reported attempt to maintain his shared custody of his daughter Sam and son Charlie (above) after his arrest last month

The star reportedly checked into The Jupiter Medical Center in Jupiter, Florida, after visiting on June 2 three days after his DUI arrest

According to the Radar Online source, Woods visited the rehab center with his children on June 2 and signed up for treatment days later.

Exactly how much Swedish Nordegren was awarded in their settlement remains contested. At the time, Fox claimed she was given $750million in exchange for agreeing to never talk about their marriage publicly.

That figure was lessened to $100million by other outlets including Forbes. Their divorce came after a parade of women including strippers and prostitutes revealed themselves as mistresses of the then untouchable golf star.

Afterwards, Woods checked himself in to the Pine Grove Rehabilitation Center in Hattiesburg, Mississippi, for sex addiction treatment.

Later, he received treatment for Vicodin addiction at The Meadows in Arizona.

Woods was arrested by the side of the road on May 29 near his mansion in Jupiter.

He had taken a cocktail of prescription drugs when police found him asleep inside his damaged $220,000 Mercedes with the engine running.

The 41-year-old was then filmed swaying in the street and slurring his words as he tried to take part in field sobriety tests.

He was later taken to a Jupiter police station where he struggled to blow into a breathalyzer and fell asleep on a chair while he was being processed.

Woods shares custody of his children with ex-wife Elin Nordegren who the friend said was now considering applying for full custody in light of his recent arrest

Woods was arrested in Jupiter on May 29 after being found by police asleep at the wheel of his $220,000 Mercedes. The car was stationary with the engine running

The golfer struggled to perform field sobriety tests and had slurred speech. He had no alcohol in his system but had taken four different prescription drugs. He is pictured struggling to stay awake at a Jupiter police station after his arrest

Though he had no alcohol in his system, Woods had taken Soloxex, Vicodin, Torix and Vioxx - four different prescription drugs. In a statement after his arrest, he said his sleepy state was an adverse reaction to them.

Woods will return to court on July 5 to face a single DUI charge

'What happened was an unexpected reaction to prescribed medications,” Woods said in the statement. I didn’t realize the mix of medications had affected me so strongly.

'I understand the severity of what I did and I take full responsibility for my actions, I want the public to know that alcohol was not involved,' he said.

He also apologized to his family and friends, adding: 'I expect more from myself too.

'I will do everything in my power to ensure this never happens again.'

His first court appearance is scheduled for July 5. If convicted, he could face up to six months in prison and fees of up to $1,000.

In a blog post published days before his arrest, the golfer described how he'd been enjoying spending time with his children after undergoing fusion surgery on his back.

'I haven’t felt this good in years,' he wrote, later explaining that he was in no rush to return to the sport competitively.

'I’m walking and doing my exercises, and taking my kids to and from school. All I can do is take it day by day. There’s no hurry,' he said.

Woods and Nordegren divorced in 2010 after his serial infidelity was exposed. They are pictured at the 2006 Ryder Cup

After the 2009 scandal, Woods sought treatment for sex addiction at the Pine Grove Institute in Hattiesburg, Mississippi