Serving under the leg

i saw in our shool team there was the best of player who did serve lifting his leg high and swinging the racket under it

still the serve got spin how, i coudent understand

i ask him to teach me but he refuse... 'how to do it'

Hi Vedant,

This serve would be illegal because his leg is between the ball and the netposts.  It is just a trick serve.  You lift your leg as you throw the ball up and hit the ball so it goes under your leg.