Who has the fastest serve in tennis history?

I heard that Sam Groth recorded one of the fastest serves ever at about 263 km/h during a professional match. That speed is unbelievable in tennis. Do you think anyone will break this record soon?
 
The record for the fastest serve in tennis history is held by Sam Groth, who blasted a serve at an astonishing 263.4 km/h (163.7 mph) during the 2012 Busan Open Challenger Tennis. However, when it comes to official ATP matches, the title goes to John Isner, who served at a speed of 253 km/h (157.2 mph) in 2016.
 
The record for the fastest serve in tennis history belongs to Sam Groth, who unleashed an astonishing serve at 263 km/h (163.7 mph) during a challenger event back in 2012. While this remarkable feat stands as the fastest ever recorded, it didn't happen at a main ATP Tour event. Nevertheless, it’s still celebrated as one of the most jaw-dropping power serves in the sport!
 
The record for the fastest serve in tennis history belongs to Sam Groth, who unleashed an incredible serve at a staggering 263 km/h (163.7 mph) during a Challenger event back in 2012. While this remarkable feat is the fastest ever recorded, it didn’t happen at a main ATP Tour tournament. Nevertheless, it still stands as one of the most powerful serves ever seen in the sport of tennis.
 
The record for the fastest serve in tennis history belongs to Sam Groth, who clocked an incredible 263 km/h (163.7 mph) back in 2012. While this impressive feat took place at a Challenger event instead of a major ATP Tour tournament, it still stands as the fastest serve ever recorded in the sport.
 
Sam Groth made the record of the fastest serve in tennis history, with a serve of 263.4 km/h (163.7 mph) in 2012. It is not an official match in an ATP but is well known. John Isner and Ivo Karlović are also among the fastest servers of professional tennis among those who are officially recognized records.
 
In 2012, Sam Groth registered a world record service of 263 km/h (163.7 mph). It was not an official ATP event but is well known. In official records, players such as John Isner and Ivo Karlovic are known to be powerful serveers with a max speed of over 240km/h and an amazing speed and technique in professional tennis matches.
 
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