In ATP circuit probably the best serve as of today (Oct 2017) is of John Isner. We looked at his two matches first serve stats against two top players – Roger and Rafa. Got some thought-provoking results but maybe no surprises. Isner lost both the matches. Below are the numbers we found and these numbers do tell us the power of a good first serve. A good first serve is a weapon to depend on and takes massive effort to develop over the junior years. When your child is playing U-12 to U-16 do keep a close eye on their first serves too and the progress they are making there. Do read our First Serve Percentage Pattern [FSPP] and First Serve Direction Pattern [FSDP] for more details.
Oh yes, Isner is 6′ 10” 🙂
Next, we look into some more things – height vs serve strength, Isner Vs best return of serves, some stats from WTA wrt the first serves and much more.

1) Rafa Vs Isner | Madrid Open | 2010 | 7-5,6-4

Rally Length First Serve Points
Won by Isner
1+ 76.7%
2+ 54%
3+ 70.6%
4+ 28.6%
5+ 40%
6+ 0%
7+ 0%
8+ 0%

2) Roger Vs Isner | US Open | 2015 | 7-6,7-6,7-5

Rally Length First Serve Points
Won by Isner
1+ 69.2%
2+ 48.1%
3+ 55.3%
4+ 36.4%
5+ 57.1%
6+ 35.7%
7+ 55.6%
8+ 33.3%
9+ 66.7%
10+ 50%