As a result, Sabalenka is the first women's singles winner to retain the title since her compatriot Victoria Azarenka in 2012-13. She's just the fifth woman this century to lift the trophy without losing a set.
12 months on, it was time for another trophy presentation and another victory lap.
"As soon as I stepped in on the court, I felt like, 'Okay, I think I'm in control, and I think I'm emotionally ready for it," said Sabalenka, winning 28 of 29 sets across the two years in Melbourne.
"So compared to last year, it's a completely different me. Compared to the US Open, once again, it's a different me. I'm more controlled and don't let the rest of the things come to my mind, and I was focusing on myself. I think it's a big difference."
Team Sabalenka embrace the pressure cooker of major tennis, making sure they work hard and play hard.
For instance, Sabalenka has been signing her physical trainer Jason Stacy's head as a ritual before matches. There's always plenty of laughter in clips across social media, they are a tight-knit group.
However their drive also makes them elite.