When a dear pup passes, it's proper to go into mourning for as long as one needs. Juan Martin del Potro did so on social media in the wake of his own best friend, a Newfoundland named Cesar.
It took four hours and 26 minutes, but Roger Federer is now guaranteed a singles medal at the London Olympics after defeating Juan Martin del Potro, 3-6, 7-6 (5), 19-17 in the semifinals.