I remember where I was when Wilhelm Bungert beat Roger Taylor, and the 7 semi-finals we have lost since. You would think just by the law of averages...
I was at school for that Taylor semi-final ( circa 1967 ? )...He was expected to win. I got even more excited when he knocked out the great Rod Laver in 1970 and then lost in the semi..and then in 73, when all the top players boycotted, Taylor was a shoe-in to win the whole thing ( the British favourite lost in the semi to the eventual winner Kodes ! )
Then, nothing for nearly 25 years, until Henman arrived on the scene. With the help of some " draw massaging " by the seeding committee, he made 4 semi's...he was never going to beat Sampras but there is no question he blew his one chance in 2001...2 sets to 1 up against Ivanisovic ( 6-0 in the 3rd !!! )...he failed to regroup after a rain break and lost.
Murray may never get a better chance at Wimbledon..you have to grab the moment...Taylor blew it in 73, Henman in 2001...
Maybe the pressure is too much for them or are they just not quite good enough ?