QUOTE(praetorian @ Jan 28 2011, 12:22 PM)
Edberg's serve was a kick serve, on his 1st and 2nd serve, apparently more on his 2nd.If you compare his kick to, today's game may be you can say ahhh kacang his serve, but Edberg could back his serve up very well, the reason was his forward movement to the net, his 1st volley usually is inside the service box, or closer...people have a huge misconception the harder they serve the more easier the 1st volley depending on the return that may be true, but in actual fact the bigger the serve, the bigger the return, the less time you have to move forward, and close in at the net, Edberg's serve allowed him to get in nice and tight, he did not care if you could return his serve, if you passed him on the return and or if he committed a unforced error, that did not change his mentality, he lived and died serving and volleying, only later in life did he sometime's not serve and volley 100%...

Kacang (to some) to produce the same effect, but a suicide to copy the same movement. i think he bend his back outrageously in comparison to others. If not mistaken, i read somewhere maybe, maybe tt.tennis-warehouse.com mentioning edberg were doing 1000 sit up per day during his teen.
So kid, please dont do this at home, only at tennis court.
Apart from edberg, mcenroe and sampras has a really nice serve motion.