I was just going through the Wimbledon history to compile a few articles for my blog (www.thetennisstat.com), that I notice that it has happened only twice since the dawn of open era that all the top 4 seeds have fell before the SF stage of Wimbledon. The first time it happened was in 1992 when Agassi won his first GS and only Wimbledon crown, he was seeded 12th. It happened again in 1996 when Richard Krajicek won his only GS. Pete Samprass was the top seed and 3 time defending champion in 1996, but lost to Krajicek in QF.