36-year-old Roger Federer is proving that age is just a number as he rolls back the years at the US Open. The Swiss player has already wrapped up the Australian Open and Wimbledon in 2017 and is aiming for yet more Grand Slam glory in New York. He dismissed Feliciano Lopez in straight sets to reach the fourth round of the tournament and is on course to bump into Spaniard Rafa Nadal in the semi-finals of the event. Nadal and Federer served up a fantastic contest at the Australian Open in a replay of the 2009 final, with the two players requiring the full five sets before Federer eventually emerged victorious. Despite this success in January, Federer has been priced up as second-favourite behind the ‘King of Clay’ for the tournament by a number of Australian bookmakers including William Hill. Federer will need to overcome German Phillip Kohlschreiber in the round of 16 before a difficult-looking meeting awaits with either Juan Martin Del Potro or Dominic Thiem. The Swiss icon hasn’t secured the title in the final Grand Slam of the season since 2008 and after missing last season’s event due to injury, he’ll be desperate to make up for lost time. Australia’s John Millman was knocked out by Federer’s next opponent Kohlschreiber and will now turn his attention to the doubles where he teams up with Ken Skupski. Other players who remain in the tournament include David Goffin, Kevin Anderson, Diego Schwartzman and home hope Sam Querry. The latter became the first US player to reach the quarter-final stage of the event since John Isner in 2011 and is on the opposite side of the draw to both Roger Federer and Rafa Nadal.