I show you with 3D ANIMATIONS how you can attack the third ball confidently after your forehand serve with a heavy side spin.
The opponent often holds his racket angled on the serve return and returns your own serve spin in an opposite spin direction.
Very important!
Do not hit the third ball wildly, but play a top-spin with heavy spin.
To attack the third ball with confidence play top-spin with stronger spin than your opponent as he returned your serve.