Denmark’s Caroline Wozniacki beat Romanian Simona Halep to win her first Grand Slam title and regain the number one ranking at the Australian Open.
The second seed won 7-6 (7-2) 3-6 6-4 in punishing conditions to finally land a major title at the 43rd attempt.
Nine years after her first Grand Slam final defeat, and 17 months after she was ranked 74th, the Dane was overcome.
“I dreamt of this moment for so many years, and to be here today is a dream come true,” said Wozniacki.
The victory means the 27-year-old will replace Halep as number one in the world rankings on Monday.
Twice a runner-up at the US Open, Wozniacki becomes the first Dane to win a Grand Slam singles title.
Halep, too, had been hoping to end the wait for a first major title to add to her number one ranking, but she has now lost in the Australian Open final as well as two French Opens.
“Of course I am sad but Caroline was better than me,” she said.
“I fight and have many years to go, so hopefully will face another challenge like today.”
The final might have been begun at 19:30 local time but conditions were brutal, with the temperature above 30C until well into the night and the humidity oppressive.
Both women had endured testing paths to the final, saving match points along the way, and at times looked on the point of exhaustion in a gripping final set.
Wozniacki deservedly took the opener in a tie-break, having let a 4-1 lead slip, and Halep appeared in trouble when she required treatment from the doctor midway through the second set.
However, after having her blood pressure taken, the Romanian returned to take three of the four next games, levelling at one set all with a forehand winner.
The heat rule was in effect should either player wish to use it, and Halep took the chance to halt proceedings for 10 minutes and allow both finalists to head off court in search of air-conditioning.
Halep had now spent over 13 hours on court during the tournament, while Wozniacki – who saved two match points against Jana Fett in round two – was approaching 12 hours.
The final set was a huge test of mind and body, and it produced some thrilling tennis.
After twice breaking serve to edge ahead, Wozniacki looked to have let another Grand Slam chance slip away when she fell a break down at 4-3 in the decider and needed treatment to a knee injury.
Instead, Wozniacki was the one who grabbed the moment, playing superbly in the final three games.
With Halep now serving to stay in the contest, Wozniacki’s brilliant defensive skills eventually forced an error on match point, leaving the Dane flat out and tearful on the Rod Laver Arena court.