The USTA app for iphone/ipad sucks worse than their website.
I'd recommend either using the link cknobman produced or saving the bookmarked link for your team/tournament as an "app" on your homescreen.
The USTA's website is such a piece of donkey dung. It still galls me everytime I have to pay off a "convenience" fee for using their frakekup website to register for events.
Our tennis ladder in contrast is so much better... which tells me if the USTA wanted to produce a product that didn't look like a mule-crossed-monkey-fraked up puzzle, they could...