MELBOURNE, Jan. 28 -- Roger Federer won his 20th Grand Slam tennis title here on Sunday after overcoming Marin Cilic in the Australian Open final.

The thrilling 5-set match ended 6-2, 6-7 (5-7), 6-3, 3-6, 6-1, making it the 6th time for Federer to win the Australian Open.

Off to a perfect start, the 37-year-old broke the Croatian's serve in the very first game of the match.

Looking shaky, Cilic made a number of unforced errors and lost another break point.

When Federer served out the set, it appeared that it might be a short evening for fans at Melbourne's Rod Laver Arena.

But showing grit and determination, the world number six regained his composure and managed to hold serve in the second set to force a tie break.

The hard hitting Croatian was then able to edge ahead and level the score at a set a piece.

In typical Federer fashion however, the world number two came roaring back and won the third set with excellent backhand returns that put Cilic under heavy pressure.

When Federer got the early break at the beginning of the fourth set, it once again looked as though Cilic was in trouble.

But somehow the former U.S. Open champion found another gear and blasted Federer with powerful baseline hitting.

The aggressive strategy paid off and Cilic broke Federer twice to take the lead and serve out the set.

With the atmosphere tense and both players exhausted leading into the deciding set, Federer told Xinhua, at that point "I was just focused on winning a game again," he said.

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