I don´t know since when ATP page has that new ATP ricoh match facts, but i think only few days, there is that career statistics what is very interresting - Many people argue that Sampras, Roddick, Goran, maybe Becker, Isner, Krajicek are best servers ever. They are all all time great servers but the best is for sure Ivo.
Those statistics are only for last 20 years, since 1991, but we can agree that before were worse racquets string and racquet technology so there is no best server before 90s- even from greatest players from 70-80s for example none of them was dominang, because of his serve - it was either, ground game or SV style.
Ivo has better ace-per match
ratio than any of great servers, has won 83% of 1st serves
, best in this category.
He has 91% won service games
- best ever.
Had saved 70% of BP in his career -
what is again best ever- we can agree, that saving BP´s has a lot to do with quality of serve.
He is not great in category 2nd serve points won
is 48th, but this is logical, because after 2nd serve most likely will be rally and Ivo´s baseline game is bellow average - maybe poor we can say. But whole 2nd serve statistics are not so much about serve, because Nadal is best ever- and is obvious that his serve is average-bellow average for top players, so logicaly he won 2nd serves because of his ground game- baseline game not, because of his serve.
And than most important is % of FS in.
Ivo is 18th, but what is more important is that from great servers only ISner has higher % of FS in.
So we can assume really that Ivo has for sure best serve ever no doubt about it. He is better than Sampras, Ivanisevic, Roddick, Becker, Isner in 4/5 categories - ace-per match, 1st serve points won, service games won, BP saved, only 2nd serve points won is worse. Also his FS% is higher than all of them besides Isner.
Don´t forget Ivo´s baseline game is for sure inferior to other guys, so % of unreturnable serves and free points by Ivo must be much higher than by others. If Ivo would have only 10% better ground game where his serve numbers would be? It is scary tought. Also don´t say his serve is good because he is tall, and similar things if this should be said than we can disqualified Usain Bolt as fastest guy on the planet, because he is taller, he has advantage than others on 100m.