It happens that sometimes players who reach the top 10 and even become solid top 5 of the tour are unable to perform well at slams. I think the prime exemple of that is Ljubicic, the guy used to be ranked a career high of #3 and a lot of time in the top 5 but his best result in a slam is a single SF, at Roland Garros in 2006. Worse, he only had another QF. In 45 slams appearance: He lost 21 times in R1, 10 times in R2 and 10 times in R3. He never did better than a 3rd round in Wimbledon and USO, despite being a fast court player. Are there other exemples of players acheving so high rankings while being so useless at slams?