Double-sided T-Shirt Design - Sports Theme

I need a creative designer to craft a double-sided t-shirt design centered around a sports theme.

Details:
- The design should be suitable for neutral colors, so it should have good visibility and appeal on shades like black, white, grey, etc.
- The graphics should reflect a 'sade' style, which I interpret as a balanced mix of simplicity and sophistication.

Ideal skills:
- Strong understanding of sports themes
- Experience with designing for neutral color palettes
- Proficiency in creating 'sade' style graphics
- Ability to create effective double-sided designs

Please provide samples of similar work in your proposal.