I decided to create this grid around the second week since the concept behind the mechanic is based on the player being able to use a grid to designate their desired formations, making the grid a necessity.
I struggled at first until I found the grid tool in adobe illustrator which allowed me to create a good example easily.
When I had the shape done I highlighted the outline to make it more presentable. This will make it easier to present it to players and clients.
The last step was to add a shaded rectangle behind it to add more contrasting colours to further emphasize the grid.
This is just a draft for the grid, it will suffice as a representation though I will probably be redesigned and scaled to fit multiple situations. It will also need multiple versions to fit larger and smaller grid numbers.