Kristine Joy, Writer

I asked ChatGPT to predict how many serves Alexander Zverev will hit in his lifetime — both in matches and practice given his first serve percentage, time spent practicing, duration of career, etc.

1-2 Million

Best Single Number Estimate: 1.4 Million

And thus, if Zverev spends 10 seconds bouncing the ball before each of those 1.4 million serves —

Time Spent Bouncing A Tennis Ball
(as part of pre-serve routine):

14,000,000 Seconds
233,333 Minutes
3,889 Hours
162 Days
0.44 Years

The average German man lives 79 years so Sascha will bounce a tennis ball for 0.56% of his lifetime.

I guess there are worse things that one could be doing for 0.56% of their lifetime, but Ben Shelton may not think so right about now.