Wrist in Serving

hi coaches,

i got ths vid of ma long serving in the slow motion for me the service has no wrist but i also saw him like that in other vids. so it is ok to serve with no wrist and how would it benefit me?

thanks

judah

here is the link of ma long serving

 http://www.youtube.com/watch?v=ZPmwJ6wG-Ao

start watching at 42-45 sec. mark 

Hi Judah,

If you watch the slow motion carefully you will see that on the backswing he does use a lot of wrist getting it right back and then his follow through he moves his wrist right forward.  You must have wrist to generate spin.  Ma Long is doing that during his serve but it can be difficult to see because of the speed he does it.