Stayed up late tonight to watch Roger Federer battle Janko Tipsarevic, ranked No. 49 in the world and a relative nobody, in the third round of the Australian Open. I’m not normally a tennis guy, but this was riveting stuff.

Tipsarevic, from Serbia, was not at all awestruck by the majesty of Federer and his absolute dominance over the sport of tennis. After 4 hours and 28 minutes of back and forth play, Federer finally closed out Tipsarevic in five sets. The fifth set went to 10-8, and the most amazing thing to me is that neither one of these guys looked tired. Absolutely incredible.

Federer has been ranked No. 1 in the world for almost four years. Think about that.