diff --git a/ietf/group/views.py b/ietf/group/views.py
index bf1e406b8..49f682bd9 100644
--- a/ietf/group/views.py
+++ b/ietf/group/views.py
@@ -1290,7 +1290,7 @@ def get_open_review_requests_for_team(team, assignment_status=None):
         Q(state_id='requested') | Q(state_id='assigned',reviewassignment__state__in=('assigned','accepted'))
     ).prefetch_related(
         "type", "state", "doc", "doc__states",
-    ).order_by("-time", "-id")
+    ).order_by("-time", "-id").distinct()
 
     if assignment_status == "unassigned":
         open_review_requests = suggested_review_requests_for_team(team) + list(open_review_requests.filter(state_id='requested'))
diff --git a/ietf/review/models.py b/ietf/review/models.py
index 7319a1a69..88fd823d0 100644
--- a/ietf/review/models.py
+++ b/ietf/review/models.py
@@ -158,6 +158,19 @@ class ReviewAssignment(models.Model):
     def __str__(self):
         return "Assignment for %s (%s) : %s %s of %s" % (self.reviewer.person, self.state, self.review_request.team.acronym, self.review_request.type, self.review_request.doc)
 
+    def save(self, *args, **kwargs):
+        """
+        Save the assignment, and check whether the review request status needs to be updated.
+        If the review request has no other active or completed reviews, the review request
+        needs to be treated as an unassigned request, as it will need a new reviewer.
+        """
+        super(ReviewAssignment, self).save(*args, **kwargs)
+        active_states = ['assigned', 'accepted', 'completed']
+        review_req_has_active_assignments = self.review_request.reviewassignment_set.filter(state__in=active_states)
+        if self.review_request.state_id == 'assigned' and not review_req_has_active_assignments:
+            self.review_request.state_id = 'requested'
+            self.review_request.save()
+            
 
 def get_default_review_types():
     return ReviewTypeName.objects.filter(slug__in=['early','lc','telechat'])
diff --git a/ietf/review/tests.py b/ietf/review/tests.py
index 5d599669a..f46e44bf9 100644
--- a/ietf/review/tests.py
+++ b/ietf/review/tests.py
@@ -4,7 +4,8 @@
 
 from __future__ import absolute_import, print_function, unicode_literals
 
-from ietf.utils.test_utils import TestCase
+from ietf.review.factories import ReviewAssignmentFactory, ReviewRequestFactory
+from ietf.utils.test_utils import TestCase, reload_db_objects
 from .mailarch import hash_list_message_id
 
 class HashTest(TestCase):
@@ -23,3 +24,36 @@ class HashTest(TestCase):
             ):
             self.assertEqual(hash, hash_list_message_id(list, msgid))
             
+
+class ReviewAssignmentTest(TestCase):
+    def test_update_review_req_status(self):
+        review_req = ReviewRequestFactory(state_id='assigned')
+        ReviewAssignmentFactory(review_request=review_req, state_id='part-completed')
+        assignment = ReviewAssignmentFactory(review_request=review_req)
+
+        assignment.state_id = 'no-response'
+        assignment.save()
+        review_req = reload_db_objects(review_req)
+        self.assertEqual(review_req.state_id, 'requested')
+
+    def test_no_update_review_req_status_when_other_active_assignment(self):
+        # If there is another still active assignment, do not update review_req state
+        review_req = ReviewRequestFactory(state_id='assigned')
+        ReviewAssignmentFactory(review_request=review_req, state_id='assigned')
+        assignment = ReviewAssignmentFactory(review_request=review_req)
+
+        assignment.state_id = 'no-response'
+        assignment.save()
+        review_req = reload_db_objects(review_req)
+        self.assertEqual(review_req.state_id, 'assigned')
+
+    def test_no_update_review_req_status_when_review_req_withdrawn(self):
+        # review_req state must only be changed to "requested", if old state was "assigned",
+        # to prevent reviving dead review requests
+        review_req = ReviewRequestFactory(state_id='withdrawn')
+        assignment = ReviewAssignmentFactory(review_request=review_req)
+
+        assignment.state_id = 'no-response'
+        assignment.save()
+        review_req = reload_db_objects(review_req)
+        self.assertEqual(review_req.state_id, 'withdrawn')