Andy Murray isn't known for his lightheartedness. You wouldn't be either if you happened to be an amazing tennis player who just happened to have his prime years coincide with the otherworldly accomplishments of Novak Djokovic, Roger Federer and Rafael Nadal. You'd have to be as serious as your grim-faced coach Ivan Lendl in that case, which Andy Murray usually is: all business all the time.
Even after utterly destroying Gregor Dimitrov in the US Open Round of 16 (6-1, 6-2, 6-2), Murray hardly let himself get comfortable. In the post-match interview, Murray almost smiled when asked to address the fact that he'd just served his fastest serve ever, clocking one at 141 mph -- a speed very few players have ever reached. Murray said he got a "little lucky" with that one, and didn't expect to do it again. Though he did say he once served 145 mph at a tournament in San Jose. Unfortunately, Murray related with just a wisp of a smile, they said afterwards the radar gun was broken and they took it apart to fix it. Murray, of course, just went back to work. He'll face the six-seed Kei Nishikori in the quarterfinals.The BEST SALES on Amazon NOW ]