Pressure will be an issue for Bradley. You can see the difference when he is comfortable vs. not. This year, he got comfortable being a regular season NBA player. He is probably not comfortable as a playoff starter.
It is Doc's job to make sure he takes as much pressure off him as he can. It is hard to simply tell a young player "be confident" but Doc can keep his role simple and talk him through this. We need Avery to be Avery, but not more than Avery. Just play your D, hit your shots, and keep moving.