Knowing where an opponents return of service should go

How do you learn where an opponent is going to return your service to enable you to 3rd ball him in the first place if I could work that out I would be ready to attack his return.

Hi Syd,

You can never be sure but in general a lot of returns come cross court, especially if the receiver isn't thinking about his return.

After a while you start to get the feel of where someone will return.  That is why a lot of the top players on'y use a couple of serves so that they get used to the returns.