Progress for Roger Federer

  • Last Updated: September 2 2012, 9:27 BST

A review of Saturday's action in the men's singles at the US Open, with Martin Klizan beating another seed.

  • Roger Federer: Claimed simple win
  • Martin Klizan: Defeated another seed 

Roger Federer continued his smooth progress through the US Open draw by easing into the fourth round with a straight-sets win over Fernando Verdasco.

Federer had not been tested in his first two matches against Donald Young and Bjorn Phau, but Verdasco, a former grand slam semi-finalist, was a step up in class, even if he had lost his four previous meetings with the world number one.

The conditions on Arthur Ashe Stadium were so hot that even Federer was sweating a lot, but one break in each set proved enough in a 6-3 6-4 6-4 victory.

Verdasco has rather dropped away since his career-best season in 2009, when he pushed Rafael Nadal all the way in the last four at the Australian Open and was a fixture in the top 10, and 35 unforced errors cost him.

Slovakia's Martin Klizan followed up his shock victory over Jo-Wilfried Tsonga by beating Jeremy Chardy to reach the fourth round.

The 23-year-old caused the shock of the men's draw so far on Thursday and he was at it again, overcoming 32nd seed Chardy from France in straight sets, 6-4 6-4 6-4.

In the last 16, Klizan will play Croatian 12th seed Marin Cilic, who was an impressive 6-3 6-4 6-7 (3/7) 6-3 winner over Japan's 17th seed Kei Nishikori.

Cilic has had a lean couple of years after rocketing up the rankings as a teenager but he has been quietly coming back into some form this season.

Nicolas Almagro ended the hopes of US teenager Jack Sock, but not without a struggle, as the 11th seed came through 7-6 (7/3) 6-7 (4/7) 7-6 (7/2) 6-1.

Sock, 19, was looking to become the first American teenager since Andy Roddick 11 years ago to reach the fourth round, and he took great encouragement from his performance.

"I feel good about my game and my physicality and my overall professionalism and the mental side," said Sock.

"Everything in my game feels better now and definitely closer to the next level."

Canada's Milos Raonic is the brightest of the game's rising stars and he showed what a danger he could be to third seed Andy Murray in the next round with a crushing 6-3 6-0 7-6 (7/3) victory over American wild card James Blake.

While Murray took almost four hours to see off Feliciano Lopez in searing heat, Raonic needed only an hour and 48 minutes to win with a display of huge serving and powerful groundstrokes.

Sixth seed Tomas Berdych had a tougher time against in-form American Sam Querrey but the Czech recovered from a set and a break down to win 6-7 (6/8) 6-4 6-3 6-2 and set up a last-16 clash against Almagro.

Mardy Fish was a winner in the evening session as he defeated Gilles Simon 6-1 5-7 7-6 (7-5) 6-3.