WIMBLEDON, England - Roger Federer neutralized Ivo Karlovic's huge serves Wednesday to reach the Wimbledon semifinals and move a step closer to a record 15th Grand Slam championship. Two-time finalist Andy Roddick, Andy Murray and Tommy Haas completed the final four.

In a match featuring short points and few rallies, Federer conjured up a few great returns to break the 6-foot-10 Croatian twice and secure a 6-3, 7-5, 7-6 (3) victory on another sunbaked day at the All England Club.