New York: Second-seeded Roger Federer found a way past the booming serve of Sam Groth in a 6-4, 6-4, 6-4 second round victory over the 104th-ranked Australian in the US Open on Friday.
Up next for Federer is Spaniard Marcel Granollers, who took out Croat Ivo Karlovic in five sets, 7-6, 6-7, 7-6, 3-6, 6-4.
Winning in New York would be the icing on the cake for a successful summer for Federer, who earlier won Halle and Cincinnati, and reached the finals of the Canadian Open and Wimbledon.
In an interview leading up to the Open, Federer said having former world No 1 Stefan Edberg as his coach has positively impacted match performances.
In what has been considered his best season since 2012, the Swiss master improved his already-stellar 2014 hard-court record to 35-5.
"My arm's still vibrating," Federer said after coping with Groth's 140-plus mph (225.31 Km/h) serves. Fourth-seeded David Ferrer reached the third round without lifting his racquet when unpredictable Aussie Bernard Tomic withdrew with a hip injury.
Sixth-seeded Czech Tomas Berdych needed five sets but got the job done against Slovakian Martin Klizan 6-3, 4-6, 6-2, 3-6, 6-3 and Wimbledon semi-finalist Grigor Dimitrov of Bulgaria continued his best-ever US Open with a 6-1, 6-2, 6-2 victory over Israeli Dudi Sela.
Austrian Dominic Thiem rallied from two sets down to defeat 11th-seeded Ernests Gulbis 4-6, 3-6, 6-4, 6-3, 6-3, but 12th-seeded Frenchman Richard Gasquet, Croatia's 14th-seeded Marin Cilic, 18th seed Kevin Anderson of South Africa, 19th seed Feliciano Lopez and 20th seed Gael Monfils all advanced.