20 time grand slam champion Roger Federer booked a fourth round spot at the Miami Open fourth round with a straight-set win over world number 103 Filip Krajinovic.

The Swiss, who is bidding for a fourth title in Miami, beat Serbia’s Krajinovic 7-5 6-3.

Federer hit 14 aces against Krajinovic and won 74% of first-serve points

He will face Russian Daniil Medvedev in the last 16.

The 20-time grand slam champion has won 14 and lost two matches on the ATP tour this season.

Earlier, Australian world number 77 Jordan Thompson beat Bulgarian 29th seed Grigor Dimitrov 7-5 7-5 to reach the fourth round.

South Africa’s Kevin Anderson continued his return from an arm injury with a 6-4, 7-6 win over Joao Sousa of Portugal.