So my idea is to make high quality sports clothing or maybe gear...

but i am trying to figure out a way to start...i am a tennis player so i was thinking of making tennis clothing...collared shirts with shorts that are good material but cheap...

it always bugs me how much I have to pay for athletic clothing...should i start in the tennis area...what should i do once I create the stuff...any ideas of what kind of fabric i should use...i like cotton shirts...but any help on my athletic clothing line...

i looked how all athletic companies started with something like a shoe(i.e. nike)
what should my key product be...

basically my advantage is price! instead of selling a shirt for 50 dollars i was thinking about 10 dollars!