Use specific Slicer based on selected value from another slicer

Hello Community - 

Thanks for your help and your thoughts - all welcomed.

I have two simple tables as per the below;

The BI Report has a main slicer that is based on the second table.

Here is what I am trying to do;

If I select Coach in the main slicer, I want to show another slicer based on the Coach column of the first table and filter out the blanks.

On the other end, if I select Physio in the main slicer, I want to show another slicer based on the Physio column this time - and again filtering out the blanks.

I could not see anything similar done anywhere else so appreciate your input here - 

Thanks,

R