Tennis World Congratulates Roger Federer on 2018 Australian Open, 20th Grand Slam Title

Here's how the tennis world is reacting to Roger Federer's Australian Open victory.

Roger Federer captured his sixth Australian Open title on Sunday, defeating No. 6 Marin Cilic in five sets.

Federer and Cilic battle for three hours and three minutes before the Swiss prevailed 6-2, 6-7(5), 6-3, 3-6, 6-1 to win a record 20th Grand Slam title.

At 36, Federer is the oldest men's Australian Open champion since Ken Rosewall in 1972. 

Here's how the tennis world reacted to Federer's title.

Congratulations to @rogerfederer, @AustralianOpen men’s singles champion and GOAT! pic.twitter.com/uernEtmTiR

— Billie Jean King (@BillieJeanKing) January 28, 2018

Well done @rogerfederer #impresive #20 #🏆 pic.twitter.com/8T5PbLRtYy

— Tomáš Berdych (@tomasberdych) January 28, 2018

Incroyable papy !!!!!! 💥2️⃣0️⃣🏆💥@rogerfederer !!!!! pic.twitter.com/irc4wTCaUT

— Stanislas Wawrinka (@stanwawrinka) January 28, 2018

This is getting a bit silly now @rogerfederer
#20 #GOAT 🏆

— Marcus Willis (@Willbomb90) January 28, 2018

Congratulations to @rogerfederer and @CaroWozniacki 🏆Great champions #AusOpen

— Hyeon Chung (@HyeonChung) January 28, 2018

Absolutely incredible!2️⃣0️⃣ Grand Slam Titles And 6️⃣ @AustralianOpen Simply The best!Congratulations @rogerfederer 🏆🏆🏆🏆🏆🏆🏆🏆🏆🏆🏆🏆🏆🏆🏆🏆🏆🏆🏆🏆🙌👏😍 #AusOpen Роджер,ты великолепен! pic.twitter.com/DgY289W6bp

— Elena Vesnina (@EVesnina001) January 28, 2018

Congratulations Roger- the GOAT!!! https://t.co/c2LE6zEdHU

— Martina Navratilova (@Martina) January 28, 2018

Nobody makes me cry like Roger Federer...no one... there is no one like him...

— Chris Evert (@ChrissieEvert) January 28, 2018

🙌🏻🙏🏻👏🏻
🏆🏆🏆🏆🏆🏆🏆🏆🏆🏆🏆🏆🏆🏆🏆🏆🏆🏆🏆🏆
#20#GOAT #NoWordsNeeded https://t.co/0nXwgnNaqR

— Caroline Garcia (@CaroGarcia) January 28, 2018

#RF20 🏆🙌👑

— Juan M. del Potro (@delpotrojuan) January 28, 2018

RF20! What an incredible achievement. And to do it in this era! Congratulations Roger!

— Jamie Murray (@jamie_murray) January 28, 2018

Congrats on your 20th Grand Slam title @rogerfederer!🏆 You‘re a #Legend!#AusOpen #Federer #RodLaver #Melbourne pic.twitter.com/WpUrObbfox

— Jan-Lennard Struff (@Struffitennis) January 28, 2018

He was so close to making it through the speech without crying! I’m crying now too 😭😭😭

— Genie Bouchard (@geniebouchard) January 28, 2018

Of course, even Federer himself took to Twitter to celebrate his victory in Melbourne:

🏆20. ❤️ pic.twitter.com/WqUiSo3fd5

— Roger Federer (@rogerfederer) January 28, 2018