Basketball Team Background Enhancement about 50 photos

I need a skilled graphic designer to enhance a photo of a basketball team. The goal is to remove the existing background while keeping the floor and reflection intact, and replacing it with a custom graphic.

Key Requirements:
- Remove existing background, retain floor and reflection
- Add a custom graphic as new background

Ideal Skills:
- Proficiency in Photoshop or similar software
- Experience with sports photography editing
- Strong portfolio showcasing past work

Please provide examples of your past work with your application.