The fastest tennis serve
The fastest serve in tennis belongs to John Isner. The 208-centimeter tall player can throw the ball with incredible speed, strength and precision. During the 2016 Davis Cup, Isner served the ball at a speed of 253 kilometers per hour. In second place is Ivo Karlovic. His fastest serve was at a speed of 251 km/h. Isner and Karlovic's records were officially recorded and recognized by the ATP. This is not the case with Samuel Groth, who set an unofficial serve speed record (it wasn’t immortalized by the official ATP system). During the Busan Open Challenger in 2012, the then 24-year-old Australian hit the service ball at a speed of 263 kilometers per hour. Later tests found that the measuring machine that measured the service speed was fully efficient, so the result is also reliable. https://youtu.be/uKeL-W7xft0?si=V_hSC5Bd9h0gGQYM https://www.radiotimes.com/tv/sport/tennis/fastest-serves-all-time/