Tennis ball shadow effect

Hi,

i’m developing a tennis game visor for a university practise.

I’m trying to simulate/fake bouncing ball + shadow effect, but i was unable to do something “real”.

The shadow should be able to move and resize in such a way that the MC appears to gain or loose altitude (the effect of separation from the stage, or lifing effect).

An image from the desired ball-shadow effect from flash tennis game and some youtube videos :

Old SNES game video effect :

Any *.fla, code, link or explanation will be much appreciated.

Regards