The official record for the fastest serve ever hit stands at a mind-boggling 163.7 mph (263.4 km/h). That belongs to the Australian fireball, Sam Groth, in 2012. To put that in perspective: you’d cover a full soccer field in less than a second. That’s faster than a car on the highway.
But hold on—tennis purists will grumble. That record was hit on a minor Challenger tour event. The official ATP record, watched by stricter radar guns, is 155 mph (249.4 km/h) by John Isner in 2016. It’s like the difference between a cannonball and a very angry baseball.
Women can do it too. Sabalenka and Venus Williams have cracked 130 mph. That’s enough to break a window, honestly.
Who Actually Hit the Corkscrew?
For decades, Andy Roddick was the king of boom. He held the record with a 153 mph missile at the 2004 Davis Cup. His serve was a blur of red hair and aggression. He made it look easy, like he was just tossing a salad.
Then Ivo Karlovic came along. A 6’11" giant, he didn't just hit hard—he hit weird. His high toss made the ball bounce like a moon rock. He once fired a 156 mph serve that the returner literally ducked from. That’s not tennis; that’s a survival instinct.
Today, Nick Kyrgios is the mystery box. He can flick a 140 mph serve while looking bored and eating a banana. His fastest—verified at 145.5 mph—is pure chaos. He’s like a cat who accidentally hits the turbo button.
