Furious former world number one Caroline Wozniacki crashed out of the Australian Open at the first hurdle Monday and admitted she had no one but herself to blame.

The Dane, who remains one of the most marketable players in tennis despite never winning a major in 35 attempts, tossed away a one-set lead against 76th-ranked Kazakh Yulia Putintseva.

"It wasn't a pretty first set but I got it done and really should have closed it off in two," Wozniacki told a press conference. 

"You know, I let her back into the match, and it was basically my own fault that I'm not here as the winner."

She romped through the first set against Putintseva but as the Kazakh's confidence grew, Wozniacki struggled to cope with her baseline game and went down 1-6, 7-6 (7/3), 6-4 in 3hrs 12 mins.

"I can't believe I won the match," said 21-year-old Putintseva, who was shaking with nerves in her courtside interview and revealed she battled through blisters on her feet and toes.

"I was very nervous in the first set because I am not used to playing on such a big court. But then I got a bit more used to it."

Her reward is a second round-clash with Chinese wildcard Han Xinyun, and a potential fourth-round encounter with world number one Serena Williams.

It was a disappointing start to the year for 18th-ranked Wozniacki, who has struggled to regain the form that saw her end 2010 and 2011 as world number one. 

She won in Malaysia last year but other highlights were few and far between.

Capping off her misery, she cut her finger badly with a bread knife and withdrew from the WTA Elite Trophy in Zhuhai, southern China, in November.

She said there was nothing she could do but return to the practice courts to improve.

"I haven't really gotten that far yet," she said, when asked how long it would take to regain confidence after losing so badly at a Grand Slam.

"But I guess just go back on the practice court and that's really all you can do.

Source: AFP