The 36-year-old Swiss defended a Grand Slam title for the first time since the 2008 US Open by retaining his trophy at Melbourne Park with a five-set win over Marin Cilic on Sunday night.
It landed Federer a record-extending 20th major and he was moved to tears during the trophy ceremony as the magnitude of what he has accomplished dawned on him and the crowd went wild during an extended standing ovation.
"Still a little bit confused that it's all over and that I was able to do it, reach number 20, number six here, it's just a lot you know - it's a lot trying to take it in," Federer told reporters at Government House in Melbourne on Monday morning.
"Last year I felt more straightforward, it was just disbelief, couldn't believe it happened, and there I was waking up with a trophy.
I asked RF2.0 @rogerfederer last night who wins 36 RF vs 25 year old RF who won his 10th slam here in 2007, He told me definitely the one ☝️ playing last night because of 3 areas of game r way better Serv especially 2nd Bachand and return of serv
— Brad Gilbert (@bgtennisnation) January 28, 2018
Roger Federer has left the door open for the possibility of playing the Dubai Duty Free Tennis Championships in February, which would give him the opportunity to overtake Rafael Nadal at the top of the world rankings.
The Swiss' Australian Open title coup on Sunday gave him his 20th Grand Slam trophy and saw him close in on Nadal, with only 155 points now separating them at the top of the rankings.
Federer, so far, is not entered in any tournaments in February but should he decide to play in Dubai (starts February 26) or any other event, he will have the chance to leapfrog Nadal before heading to Indian Wells and Miami in March, where the Swiss is defending both titles.
Federer has not held the No. 1 ranking since November 4, 2012, and a return to the summit would cap a tremendous 12 months for him where he captured three Grand Slam titles after hitting the age of 35.
Is he tempted to play Dubai to try and catch Nadal, who is currently sidelined for three weeks nursing a hip injury but is due to compete in Acapulco next month?
— Roger Federer (@rogerfederer) January 29, 2018
The 27-year-old became the first player - man or woman - from Denmark to lift a singles Grand Slam trophy when she defeated Simona Halep in three tight sets in scorching weather on Saturday.
She got just one and a half hours of sleep on Saturday night before she met with reporters at the Royal Botanic Gardens on Sunday morning for a special photo shoot with the Daphne Akhurst Memorial trophy.
"I'm just overwhelmed, excited, happy, a mix of a lot of emotions," Wozniacki said.
"I'm just soaking it all in. This doesn't come every day, so when I have this opportunity and have these amazing days - I'm just really thrilled to be here."
I got too nervous to watch but woke up to @CaroWozniacki new number one and aussie open champ. So awesome. So happy. Are those tears? Yup they are. 😭 from a year ago to today I'm so proud my friend so proud. Literally can't even sleep now
— Serena Williams (@serenawilliams) January 27, 2018