diff --git a/addons/sales_team/models/crm_team.py b/addons/sales_team/models/crm_team.py
index 95f451086fd..a05520d422b 100644
--- a/addons/sales_team/models/crm_team.py
+++ b/addons/sales_team/models/crm_team.py
@@ -92,6 +92,9 @@ class CrmTeam(models.Model):
         # (to avoid having twice the same month/week/day from different years/month/week)
         if self.dashboard_graph_group == 'month':
             start_date = date(start_date.year + start_date.month / 12, start_date.month % 12 + 1, 1)
+            # handle period=week, grouping=month for silly managers
+            if self.dashboard_graph_period == 'week':
+                start_date = today.replace(day=1)
         elif self.dashboard_graph_group == 'week':
             start_date += relativedelta(days=8 - start_date.isocalendar()[2])
             # add a week to make sure no overlapping is possible in case of year period (will display max 52 weeks, avoid case of 53 weeks in a year)