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Roger Federer reached the fourth round of Miami Open with a straight victory over the world's 103 Filip Krajinovic.
He made Switzerland, applying for a fourth title in Miami, beat Serbia's Krajinovic 7-5 6-3.
Federer converted only two of eight cut points in the opening set but became more accurate as the game progressed, finishing with 35 winners to 23 non-forced errors.
It will face either American Reilly Opelka or Russia's next Daniil Medvedev.
Federer hit 14 aces against Krajinovic and won 74% first points of service.
The Grand Slam 20-time champion has won 14 and lost two games on the ATP Tour this season.
Earlier, the world's 77 Australian beat Jordan Thompson's Bulgarian seed Grigor Dimitrov 7-5 7-5 to reach the fourth round.
Kevin Anderson, South Africa, continued to return from injury to the arm with a 6-4 7-6 win (8-6) over Portugal's Joao Sousa.
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