A press conference in which a New York nightclub hostess, who denies having an affair with Tiger Woods, was expected to shed some light on her relationship with the married father of two has been cancelled “due to unforeseen circumstances”.

Speculation has mounted about the golfer’s personal life since he crashed his car into a fire hydrant and tree outside his home in Florida in the early hours of last Friday morning.

Tabloid newspapers have alleged that he had an affair with hostess Rachel Uchitel.

Uchitel’s lawyer Gloria Allred was expected to make a statement about her client’s relationship with Woods today, but will not do so now.

A spokeswoman for Ms Allred’s office said: “Due to unforeseen circumstances, Ms Uchitel has cancelled the press conference which was due to take place later today.

“There will be no further statements on the matter.”

The nightclub hostess has previously denied having an affair with the world’s number one golfer, but since the alleged affair was reported in the National Enquirer, a second woman has gone public with claims of a fling with Woods.

Yesterday, the golfer himself apologised for letting his family down in a statement that alluded to “personal sins” and the forced exposure of “intimate details” of his life.

It came as US Weekly reported that a Los Angeles cocktail waitress claims she had a 31-month affair with Woods.

The magazine released what it said was a voicemail - provided by waitress Jaimee Grubbs - that a man who identified himself as Tiger left on her phone three days before his accident.

Ms Grubbs told the magazine she met Woods at a Las Vegas nightclub the week after the 2007 Masters - two months before Woods’ wife Elin Nordegren gave birth to their first child.

US media has suggested the reports of an affair may have led to a domestic dispute between Woods and his wife, 29, leading up to the crash.

Yesterday, Woods, who was cited for careless driving and told he must pay a fine of $164 dollars in relation to the car crash, did not comment directly on the claims, but said: “I have let my family down and I regret those transgressions with all my heart. I have not been true to my values and the behaviour my family deserves.

“I am not without faults and I am far short of perfect.”

He said he was “dealing with my behaviour and personal failings behind closed doors” and added: “I will strive to be a better person and the husband and father that my family deserves.

“For all of those who have supported me over the years, I offer my profound apology.”

He went on: “The stories in particular that physical violence played any role in the car accident were utterly false and malicious. Elin has always done more to support our family and shown more grace than anyone could possibly expect.”

He also hit out at the way he has been hounded to expose “intimate details” of the couple’s life together.

“Personal sins should not require press releases and problems within a family shouldn’t have to mean public confessions,” he said.

Woods was left dazed, bloodied and in need of medical attention to cuts to his face after the crash at 2.25am (7.25am Irish time) on Friday.

His wife told police she used a golf club to smash the back windows of the SUV in a bid to get her injured husband out of the vehicle. But since the incident there has been growing speculation over the circumstances leading up to the accident.

The pair have been married for five years and have two children together. To date, Woods has benefited from a squeaky-clean image which has helped him amass a fortune through product endorsements and appearance fees.