Sure!! Select your date field in your PT. Right_Click and choose Group and Show Detail. Select Group. Choose to group by days. Change the number of days to 7 (1 week). For start date, enter a Monday's date. You're done.
If you have dates in a field, select a cell in that field. Now right click and choose "Group and Show Detail". You should get a dialog that offers you the choice of how to group. Choose days and proceed as above. You are not looking for a specific day of the week. When you choose "Group by Days", you will be given the choice of a start date. Simply enter a date for a Monday.