Andy Roddick 153 mph June 11 2004
The fastest ever serve recorded; 251 Km/h, was by Ivo Karlovic.
Jai-alai
It is hard to determine what the average speed of a tennis serve is from various players, but Sam Qurrey is among the fastest serves of all time. He has recorded a serve of 141 miles per hour at multiple events.
The fastest non-mechanized sport in the world is ski racing or speed skiing. Second would be a tennis serve. The speeds reached in speed skiing are approximately 162 mph, and 262 kph
the fastest speed ever is 12874.97 mph
It depends on how hard you want to hit the ball
75.2 metres/sec = 75.2 x 3600 met/hr = 75.2 x 3.6 km/hr ie 270.72 km/hr
Milos Raonic...with a serving speed of 225km/h
214 mph
75 mph
400 mph.
Australia's fastest animal is the Kangaroo. The fastest recorded speed of a Kangaroo is 70 km/h which is 25 km/h FASTER than the fastest recorded speed of Australia's flightless bird the Emu.