Final answer:
As of early 2023, Rafael Nadal and Ashleigh Barty are the reigning Men's and Women's Singles champions of the Australian Open.
Step-by-step explanation:
The current Men's and Women's Singles champions of the Australian Open as of my knowledge cutoff in 2023 are Rafael Nadal for the Men's Singles and Ashleigh Barty for the Women's Singles. Nadal, hailing from Spain, won the title after a remarkable comeback in the final. In contrast, Ashleigh Barty, who is Australian, delighted the home crowd by winning the Women's Singles championship. It is always a possibility that new champions could be crowned in future iterations of the tournament, so for the most recent information, you may need to check the latest sports news or the official Australian Open website.