The tournament - held for Australian players whose rankings wouldn't automatically get them into the main draw - was held this past week, and Dellacqua was the one who made it all the way to the end.
The No.1-seeded Dellacqua had a few bumps, rebounding from a first set blowout to defeat No.6 seed Monique Adamczak in the quarterfinals, 06 61 62, and regrouping after dropping the first set to beat No.3 seed Arina Rodionova in the final, 57 61 60. She won her other two rounds in straight sets.
"I feel like I deserve to be in the Australian Open, and I'd rather do it this way than to ever expect anything or be guaranteed anything," Dellacqua told Tennis Australia. "So I'm stoked that I won today."
Dellacqua's best season in singles came back in 2008, reaching the fourth round at the Australian Open and the third round at two of the other three Grand Slams, and setting a career-high ranking of No.39. Since then she has been better known for her doubles play - this past year she reached three Grand Slam doubles finals with Ashleigh Barty - but could this be the start of a resurgence in singles?
Watch highlights from Sunday's championship match between Dellacqua and Rodionova right here!
This was the second of three wildcard play-offs being held around the world for the Australian Open. The first took place in Shenzhen, China recently, with Tang Hao Chen coming through that one, beating Japan's Risa Ozaki in the final, 63 63. The 19-year-old Chinese won't just be playing the first Grand Slam main draw of her career, she will be playing the first WTA-level main draw of her career.
The third wildcard play-off will take place this weekend in the US - in Norcross, Georgia - with eight American players in the line-up: Madison Brengle, Julia Cohen, Victoria Duval, Nicole Gibbs, Grace Min, Shelby Rogers, Maria Sanchez and Sachia Vickery. Check back next week to find out who won!