The fastest serve in tennis was recorded by Sam Groth at a blazing speed of 263.4 km/h (163.7 mph) during the 2012 Busan Open. Although not officially recognized by the ATP, it remains the fastest ever recorded. Among official ATP records, John Isner holds the title with a serve of 253 km/h (157.2 mph). These powerful serves highlight the extreme speed and precision in modern professi... https://letsgotennis.com/tennis-history/fastest-tennis-serves-ever/