Thanks for those stats. I just checked and apparently Connors played 1491 matches and Lendl played 1308. Considering the game became progressively more physically demanding, which of the three figures (Connors, Lendl, Agassi) is most impressive? I'd probably have to give it to Lendl....
Lendl, Connors and Agassi are all up there for being ironmen. The game has gotten more and more physically demanding so Agassi's 20 years against many different generations is quite the acheivement.
Jummy's play as an old man is really astonishing. Even after he was 40 years old at 42 or 43, he would put up a fight with top 40 players. His serve would get pounded, but few players even in his old age could hold easily against him.