Question

Is this sentence grammatically correct? If not, what is the correct form?
"If you want to become a successful athlete, not only you need to work hard, but also go on a good diet."

Answer 1

if it was me I would say "If you want to become a successful athlete, you not only need to work hard, but also need to go on a good diet." That just makes more sense to me! Hope it helps

Answer 2

" If you want to become a successful athlete, you need not only to work hard, but also go on a good diet".