It is one feat among several on the resume of the greatest players. It also worth noting that several of the greatest ever don't have the Career Slam: Helen Wills, Suzanne Lenglen and Monica Seles.
it's quite ridiculous to put together Wills , Lenglen and Seles . It wasn't possible for the first to win All4 , moreover term "Grand Slams" as well as 4 Grand Slam tournaments were officially recognized by ITF in 1925 , when Suzanne was almost retired and Wills didn't care about such a remote and just established as a Majore as AO ........
as for Career Grand Slam - it's huge achievement by itself.. We have 4 Grand Slam tournaments with about a century years history. Each player's goal is to win Wimbledon, French Open, Us Open and Australian Open. Any player , who is multiple GS champion I'm sure was struggling to the end of career to win eventually missing Major Title. Career GS in contemporary tennis - confirmation that player is competent on all different tennis surfaces, being versatile, having ability to adapt game to different conditions is always highly valued
The fact that only 10 players managed to achieve CGS just shows that winning CGS is a tough goal , just in comparison , winning 5+ Slams managed 30 women
The only thing missing from Sampras' resume is a victory on the French Open clay. He realizes that without it, he might not be regarded as No. 1 all-time, no matter how many Slams titles he wins.
By Larry Schwartz
Special to ESPN.com in 1999