答案是Andy Roddick  在04年台維斯盃所發出  苦主是白俄羅斯的Vladimir Voltchkov

速度是155mph (249.4 kph)  XD  超快
文章節錄
=============================
Roddick also registered a serve of 155mph (249.4 kph) to go 40-0 up at 5-4 in
the third set, giving himself three match points. If verified, as is likely
once the raw data from the radar gun has undergone detailed analysis, then
this will be a new world record, breaking his own record of 153 mph(246.2 kph)
set at Queen's Club this year. It is in fact the third time Roddick has broken
the world record in Davis Cup play this year, as he has managed it in each of
the USA's ties so far.
==============================
第二名是還是Roddick  153mph  在同年女王草地賽四強發出
苦主是Paradorn Srichaphan

至於之前的紀錄保持人  是Greg Ruseski  149mph

其他發球大砲
Greg Rusedski (GBR) 149 239.7 1998 Queens
Taylor Dent (USA) 144 232 2001 Wimbledon
Mark Philippoussis (AUS) 142.3 229 1997 Dusseldorf
Julian Alonso (ESP) 140 225 1997 Long Island
Gilles Elseneer (BEL) 140 225 2003 Basel
Joachim Johansson (SWE) 140 225 2004 Australian Open