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

By Jamie Lisanti
January 28, 2018

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.

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

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