Girls, How long does it take to get used to a sports bra?

debbiedenise
I bought a new sports bra the other day. I have worn it twice for tennis and once for running. It feels uncomfortable to me. My friend said that they can take as many as ten wearings to break in really well. Is this true, or shall I buy another?
Girls, How long does it take to get used to a sports bra?
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