After the Australian Nick Kyrgios showed the door to top seed Roger Federer in the second round, the young gun fell to the big-serving American John Isner in his next match in the Mutua Madrid Open. The hard-fought match with Federer probably brought fatigue, which Kyrgios probably couldn’t overcome against Isner. Elsewhere in the men’s draw, Rafael Nadal looked like his old self in easing past Italy’s Simone Bolelli, Andy Murray entered the quarterfinals after sweeping