Sabalenka beats Rybakina to win Australian Open in thrilling final
An 11th straight win of the year also means the Belarusian will return to a career-high ranking of number two behind Iga Swiatek, reaping the rewards of her improved mental stability and service to emerge as a genuine threat in big tournaments.
Rybakina went up 3-1 with a comfortable hold after fifth-seed Sabalenka dropped her huge serve with a double fault and sent a forehand long, but the Kazakh came under pressure and allowed her opponent to level the opening set at 4-4.
Rybakina hit back immediately, however, turning up the heat in gusty conditions at Rod Laver Arena to grab another break as Sabalenka double-faulted for a fifth time, and going on to seal the set with a big serve that the Belarusian returned into the net.
It was the first time that Adelaide champion Sabalenka had dropped a set in 11 matches this year and the nerves began to show just a bit, before she composed herself and saved two break points in the opening game of the next set.
Sabalenka then found a bit of consistency to break but had to overcome a wobble to grab a 4-1 lead after which she let out a huge roar and levelled the match with her 11th and 12th aces to take the match at Melbourne Park to a third set.
"Thank you so much for an amazing atmosphere," said Sabalenka, who received the trophy from former world number one Billie Jean King.
"And of course my team, the craziest team on tour, I would say. We've been through a lot of downs last year, we worked so hard."
"I hope next year I come back and I show you even better tennis, and you guys support me even more," she added.
Sabalenka served with venom and hammered deep returns in the decider to punch holes through Rybakina's defence for a 5-3 lead. She then double-faulted on one matchpoint and squandered two more before finally prevailing to claim the Daphne Akhurst Memorial Cup.
She walked to Rybakina's side of the court and gave her a hug before climbing up to embrace her team in her players box.
"I kept telling myself that nobody said it was going to be easy. She was going to fight for it... I told myself, 'Work for it, take deep breaths, just work'," Sabalenka told host broadcaster Channel Nine.
She took a few deep breaths and tried again, finally closing out the contest to claim the Daphne Akhurst Memorial Cup.
"It was a really tough year and I had tough moments last year. We worked so hard. Right now, I'm just super proud of myself," Sabalenka added.
"I would like to congratulate Aryna.. I know how hard you have worked for that," said Rybakina. "Hopefully we're going to have many more battles.
"I had goosebumps when everyone was cheering for us.. I'm looking forward to coming back next year.. It was an amazing two weeks for me and hopefully I'm going to have the same results and even better."