Federer, Anderson advance to fourth round in Miami
Roger Federer overcame a sluggish start to defeat Filip Krajinovic 7-5 6-3 and Kevin Anderson's booming serve proved too much for Joao Sousa as both seeded players advanced to the fourth round of the Miami Open on Monday.
Serb Krajinovic broke Federer to jump into an early 2-1 lead in the first set and it looked like an upset could be in the works against the 20-time Grand Slam champion.
But momentum swung in the fourth-seeded Federer's direction when he blasted a cross-court forehand winner to break Krajinovic's serve to take the closely fought first set.
The 37-year-old Swiss coasted after that thanks to an overpowering serve that Krajinovic struggled to read.
Next up for Federer is a clash with Russian Daniil Medvedev, who was made to work harder for his win, spending nearly two-and-a-half hours on court with Reilly Opelka and prevailing 7-6 (5) 6-7 (5) 7-6 (0).
Anderson mixed 13 aces with just one double fault to seal a 6-4 7-6(6) victory over Portuguese Sousa earlier on Monday.
The towering South African sixth seed will be a heavy favourite on Tuesday when he faces unseeded Australian Jordan Thompson, who beat Grigor Dimitrov 7-5 7-5.
Denis Shapovalov took less than 30 minutes to go a set up, but needed a further hour to finish off Andrey Rublev 6-3 7-6 (5), while David Goffin beat 14th seed Marco Cecchinato 6-4 6-4 and Frances Tiafoe got the better of David Ferrer 5-7 6-3 6-3.
Additional reporting from PA