What makes Schalager's serve effective

Hi Alois

I just watched this clip http://www.youtube.com/watch?v=psqmHQYKDYs&feature=related

I must say I'm really surprised by his serves. What makes his serve so fast and spinney?

I don't think only the wrist movement is enough to do a very good quality serve. 

Any idea? 

Hi Ittipat,

Schlager is serving with a lot of variation and deception.  He has a very similar movement for a lot of serves so it is hard to tell until the last moment what type of serve is coming.  However the main contact and spin uses a lot of wrist to generate the spin.