Potentials closing date - show this date in customers overview-list

Potentials closing date - show this date in customers overview-list

Is it possible to create a FIELD inside CUSTOMER which shows the CLOSING DATE of a POTENTIAL from this CUSTOMER ?

Because we want to filter CUSTOMERS with/without POTENTIALS and want to sort them by CLOSING DATE.

If it's not possible, could you make it possible? :-)


(At the moment we use a created field inside the customer and manually add the potential date, but this is a lot of stupid work. so it would be very nice, if it could work automatically)