Limits RegistryPUBLIC RECORD
Limits RegistryAustralia's Sam Groth served at 263.4 km/h (163.7 mph) at a Challenger-level tournament in Busan, South Korea, in May 2012 — the fastest tennis serve ever recorded. The ATP does not recognize it as the official tour record because Challenger-event radar guns are not calibrated to ATP tour standards; the ATP's own recognized record is John Isner's 253.0 km/h serve at the 2016 Davis Cup.
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Australia's Sam Groth served at 263.4 km/h (163.7 mph) at a Challenger-level tournament in Busan, South Korea, in May 2012 — the fastest tennis serve ever recorded. The ATP does not recognize it as the official tour record because Challenger-event radar guns are not calibrated to ATP tour standards; the ATP's own recognized record is John Isner's 253.0 km/h serve at the 2016 Davis Cup.
The fastest tennis serve speed ever recorded by radar gun at a sanctioned tournament. Distinct from the ATP's own stricter tour-level record, which requires tournament-grade calibrated radar not used at every event.
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Permanent ID limitsregistry.com/limits/LR-FASTEST-TENNIS-SERVE
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Limits Registry. LR-FASTEST-TENNIS-SERVE. Fastest tennis serve ever recorded. 2026.