I could see the post-match interview as well - couldn't understand everything that was said (Swiss German is quite a difficult language to understand...) but it was obvious that Rogi was in a very good mood, lots of laughs there. Nice to see!
Federer has mastered the art of winning at 40-50% level in early rounds to save himself for SF/F in these MM events. In the SF he'll be at 75%, final hopefully 90%. Of course slams are a different fuel ratio for the FedBot.