Oh yeh and I think Camelot have made the best/most realistic tennis game out there (gameplay wise). Mario Tennis!

I think Virtua Tennis is BS. The way the ball is hit in the position that it lands is unrealistic (e.g. If the ball bounces really low in front of the net, you can perform a clean for/back hand). In real tennis (and in Mario tennis), the angle from which the ball is landed would result in you either:-

1) Lobbing the ball
2) Touching the ball over the net very slightly
3) Going crosscourt , againt touching the ball over the net
4) Smashing your racquet on the floor (dunno about this with Mario tennis).