Updated On: 19 January, 2017 08:52 AM IST | | PA Sport
<p>Roger Federer admitted to feeling disappointed after scrapping his way to a 7-5 6-3 7-6 (7/3) victory over America's Noah Rubin and into the Australian Open third round</p>

Roger Federer, Noah Rubin

Roger Federer. Pic/Getty Images
Melbourne: Roger Federer admitted to feeling disappointed after scrapping his way to a 7-5 6-3 7-6 (7/3) victory over America's Noah Rubin and into the Australian Open third round.