I know what you want, and you'll have the opportunity to prove that ability.
For the first time, he had been given an opportunity to prove himself.
"But today you have an opportunity to prove me wrong."
You now have an opportunity to prove it once again.
But what I am doing is giving you the opportunity to prove me wrong.
Here is the perfect opportunity to prove that they are serious.
You have given me an opportunity to prove a theory.
But you may never have the opportunity to prove it.
"I decided to give him an opportunity to prove his worth."
I was just giving them the opportunity to prove how tough they were.