Madison Keys arrived in Australia under the radar and with the modest goal of seeing how well she could perform with her 30th birthday looming next month.

Madison Keys has learnt plenty since her last, and first, grand slam final – mainly to embrace the prospect of being “uncomfortable 99 per cent of the time”.

Madison Keys beat Aryna Sabalenka 6-3, 2-6, 7-5 in the Australian Open final at Melbourne Park Saturday. The No. 19 seed prevailed over the No. 1 seed in a fast-paced match, ultimately decided by Keys’ incredible serving in the first set,

American underdog Madison Keys finally gets her hands on a Grand Slam trophy after holding off defending champion Aryna Sabalenka to win the Australian Open.

Keys' last and only other appearance in a grand slam final was eight years ago, where fellow American Sloane Stephens won the match against her. Related: Naomi Osaka & More Female Tennis Stars Reflect on the WTA's Legacy as U.