So, the other day I got to thinking, how fast can a tennis ball really go? I mean, we’ve all seen those pro matches where the players are just smashing the ball across the court. I got curious and decided to dig into it.
I started off by just watching some videos online. I was trying to see if I could find any clips of crazy fast serves. After a while, I realized I needed some actual numbers. So, I fired up the search engine and typed in something like “fastest tennis serve ever” or something along those lines.

First few results? Boom! There it was. This dude named Sam Groth apparently blasted a serve at 163.7 mph (263.4 km/h) back in 2012 at some Challenger event. I was like, “Holy crap, that’s insane!” I mean, I can barely throw a ball that fast, let alone hit it with a racket.
Then I kept digging. I found this table that had a whole list of players and their fastest serves. There were a few other names that popped up, like:
- Albano Olivetti at 160.0 mph (257.5 km/h)
- John Isner at 157.2 mph (253.0 km/h)
- Ivo Karlović at 156.0 mph (251 km/h)
And get this, even Milos Raonic hit one at 155.3 mph (250.0 km/h) at some tournament. These numbers are just mind-blowing. I tried to imagine how fast that is. Like, if you were standing on the other side of the court, you’d barely have time to blink before the ball was past you.
This got me thinking about reaction time. I stumbled upon some info that said that when a player named Dominic Inglot served, his opponents, on average, only had about 0.5 seconds to react. Half a second! I was just floored!
I also found out that even the women are serving rockets. I saw that Serena Williams, who’s like a legend, once served at 128.3 mph (206.4 km/h). That’s still super fast, even if it’s not quite as fast as the men.

So, after spending a good chunk of time going down this rabbit hole, I’ve come to realize that these tennis pros are serving the ball at speeds that most of us can only dream of. It’s pretty awesome, and it definitely makes watching tennis a whole lot more exciting, knowing just how much power is behind those serves. It’s not just a game of finesse, it’s also a game of pure, raw power. No wonder those players are so fit!