These are outfits that I've put together for myself from Old Navy.
Babies also get their clothes really dirty with things that need to be washed right away (spit-up, pee, poop), so you'll probably be doing laundry every day. It depends how often you go out. Most moms don't like to expose their new babies to outside ...
What I know is that the rules have been changed recently, and all matches will be 3 sets exept for men's Grand Slams (5 sets). So now the masters series final should be only 3 sets.