What are the rules when playing doubles? If the serving player (or the one receiving the serve) is naturally positioned at the baseline, should his/her partner be at the net (or more generally, at "the front")? If so, is it a requirement or simply a "best practice"?
I'm asking because I prefer to always stay at the baseline, but I'm often pestered by my partners who insist that I go to the net when they are serving (or receiving the serve).
PS: I'm not asking whether my choice is "strategically" the best, but rather whether it is a allowed by the official rules.