New York, September 3: American tennis player Jack Sock upset 2014 champion Marin Cilic of Croatia in surprisingly routine fashion, breezing into the US Open pre-quarterfinals with a 6-4, 6-3, 6-3 victory, while big names Novak Djokovic and Rafael Nadal also progressed to the Round of 16.
Sock completely dominated his own service games, not facing a single break point in the contest.
Next up for the 23-year-old American will be ninth-seeded Frenchman Jo-Wilfried Tsonga, who moved into the fourth round with a 6-3, 6-4, 7-6 (7-4) victory over 23rd-seeded South African Kevin Anderson.
In another third-round men's singles result Friday, Serbian top seed and world No. 1 Djokovic advanced to the Round of 16 for the 10th consecutive time in the US Open when Russia's Mikhail Youzhny retired with a leg injury while trailing 2-4 in the first set.Djokovic, who moved into the third round with a walkover victory over Czech Jiri Vesely, is now in the "business end" of the tournament without much match practice.
He will next take on British up-and-comer Kyle Edmund, who dismissed huge-serving American John Isner 6-4, 3-6, 6-2, 7-6(5).
Two-time US Open champion Nadal of Spain breezed past Russian Andrey Kuznetsov 6-1, 6-4, 6-2.
In the next round, the 30-year-old will face Frenchman Lucas Pouille, who edged past Spaniard Roberto Bautista Agut 3-6, 7-5, 2-6, 7-5, 6-1.
World No.2 Kerber made quick work of qualifier American Catherine Bellis with a 6-1, 6-1 triumph to book a place in the fourth round, where she'll play former No.2 Kvitova, who moved past Ukranian Elina Svitolina 6-3, 6-4.
