there are two ways:
1 - set recurrence period to daily and select ‘only work days’
2 - set recurrence period to weekly and select the working days
remember that if you mark the todo on friday as complete, a new todo will be created for monday immediatly. So it could look if it is created for saturday. Look at the due date to see for which day the todo is meant.
Alternatively, you can select ‘set recurrence on the date the todo comes from the tickler. This will hide the todo until the day of the week it is meant for, so the todo for monday will not show up until monday.
Another option is to set the recurrence on the due date and show the todo 1 day in advance. This will hide the todo for monday until sunday.