Not sure if this was taken out of context, but I found this quote interesting:
Federer also expressed gratitude for Sunday's match, which he said would give him confidence when he hopefully faces the higher - and younger - seeds later in the championship.
"It's good to have five-setters so you know where you're at," he said.
Exactly where Federer is at isn't entirely clear, but he believes wherever it is will be good enough to handle the likes of one of his biggest threats, Scotland's Andy Murray.
"I don't know how fit Murray is," he said.
"I'll take him on any day in a five-setter.
"He's younger so he's probably not so experienced, you know.
"In the end it becomes very mental, and I know that this is where my biggest strengths always come into play.
"That's why I'm always going to favour myself in a fifth set."
Quote taken from: http://au.sports.yahoo.com/tennis/ne...ough-set-match