163.4mph (263km/h). Recorded by Samuel Groth in Busan during an ATP Challenger match
The fastest speed is 763.035mph
The record for the fastest ace is held by Ivo Karlovic who served a 156 mph (~251 km/h).
Andy Roddick 153 mph June 11 2004
the fastest recorded speed was about 40 mph.
the fastest speed ever is 12874.97 mph
The fastest typing speed was by a women maintaining a speed of 212 wpm.
My highest speed is 26.4
Venus Williams holds the record with a serve of 204 km/h at the French Open in 2007
The fastest tsunami speed recorded is 800 [eight hundred] miles per hour