What's the fastest tennis serve ever recorded, in km/h?

Q: What's the fastest tennis serve ever recorded, in km/h?

263 km/h (263). Sam Groth, 2012 — the ball crossed the court in under a third of a second. Source: ATP

263

km/h

Sam Groth, 2012 — the ball crossed the court in under a third of a second.SOURCEATP

Scale check: 263 is roughly a packed double-decker bus.

Would you have guessed? You'll be way off.

Way Off is a game which asks questions like this every day. Guess by order of magnitude, watch the truth be revealed, and beat your friends by being the least wrong.

Play today's Way Off — free

More Sport numbers you'll get wrong

How many registered soccer players are there worldwide?the answer will annoy you How many people watched the 2022 World Cup final?the answer will annoy you What does 30 seconds of Super Bowl ad time cost, in dollars?the answer will annoy you How many people reach the summit of Everest per year?the answer will annoy you All 314 facts →