who has the fastest serve in the atp tennis history at 163.4 mph
Fastest recorded tennis serves Although the Association of Tennis Professionals does not formally recognise service speed records made in Challenger events due to the variance in radar guns, the serve of 263.4 km/h (163.7 mph) recorded by Australian Sam Groth at an ATP Challenger event in Busan, South Korea in May 2012 was measured using approved equipment, and other data gathered appeared within a normal range. However, John Isner holds the official record for the fastest serve at 253 km/h (157.2 mph).[2]
Ivan Ljubičić Since retiring, Ljubičić has coached ATP top 3 players Milos Raonic and Roger Federer. He was credited with Federer's improved backhand, especially evident on high shots, and tactical change of taking shots much earlier, taking more time, pace, and rhythm off his opponents at the same time making his overall game more offensive.