Hurkacz beat Jannik Sinner 7-6(4), 6-4 in the men's final and says the win is a massive confidence boost.
World number one Ash Barty successfully defended her Miami Open title, beating Canadian Bianca Andreescu 6-3 4-0.
Barty returns to the final after beating No. 5-seeded Elina Svitolina 6-3, 6-3.
The Russian will face either Dusan Lajovic of Serbia or American Frances Tiafoe for a place in the quarterfinals of the prestigious ATP Masters and WTA hardcourt tournament.
In her first match since winning the Australian Open, women's world number two Naomi Osaka beat Ajla Tomljanovic 7-6 (7/3), 6-4.
The Swiss great had not played a match since a semi-final defeat by Novak Djokovic at the Australian Open in January 2020, 405 days ago.
Serbian tennis player Novak Djokovic breaks Roger Federer's record for most weeks as the men's top number one, and plans to win many more Grand Slams.
Novak Djokovic used superb serving and his usual relentless returning and baseline supremacy to grab 11 of 13 games in one stretch and beat a visibly frustrated Daniil Medvedev 7-5, 6-2, 6-2 on Sunday for a third trophy in a row.
Naomi Osaka has now underlined her status as the new queen of women's tennis.
Australian Open Tournament Director Craig Tiley said the event will start on February 8, three weeks later than scheduled.
Hundreds of sporting events disappeared around the world during 2020 in the midst of a raging Covid-19 pandemic.
Victoria State sports minister says negotiations on the 2021 Australian Open in Melbourne is at a "very complex" stage, but he remains confident it will go ahead in the early part of 20
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