diff --git a/insalan/tournament/views/player.py b/insalan/tournament/views/player.py
index 771016a9..40261e59 100644
--- a/insalan/tournament/views/player.py
+++ b/insalan/tournament/views/player.py
@@ -12,6 +12,7 @@
 from rest_framework.views import APIView
 from rest_framework.authentication import SessionAuthentication
 
+from insalan.tournament.models.validators import valid_name
 from insalan.user.models import User
 import insalan.tournament.serializers as serializers
 
@@ -45,10 +46,22 @@ def patch(self, request, *args, **kwargs):
             }, status=status.HTTP_403_FORBIDDEN)
 
         if "name_in_game" in data:
-            player.name_in_game = data["name_in_game"]
-
-        player.save()
+            if(valid_name(player.team.tournament.game, data["name_in_game"])):
+                player.name_in_game = data["name_in_game"]
+            else:
+                return Response(
+                    {"name_in_game": _("Pseudo invalide")},
+                    status=status.HTTP_400_BAD_REQUEST
+                )
 
+        try:
+            player.save()
+        except Exception as exc:
+            return Response(
+                {"player": str(exc)},
+                status=status.HTTP_400_BAD_REQUEST
+            )
+        
         serializer = serializers.PlayerSerializer(player, context={"request": request})
 
         return Response(serializer.data, status=status.HTTP_200_OK)
diff --git a/insalan/tournament/views/substitute.py b/insalan/tournament/views/substitute.py
index 608a2b2b..329beb95 100644
--- a/insalan/tournament/views/substitute.py
+++ b/insalan/tournament/views/substitute.py
@@ -12,6 +12,7 @@
 from rest_framework.views import APIView
 from rest_framework.authentication import SessionAuthentication
 
+from insalan.tournament.models.validators import valid_name
 from insalan.user.models import User
 import insalan.tournament.serializers as serializers
 
@@ -45,9 +46,21 @@ def patch(self, request, *args, **kwargs):
             }, status=status.HTTP_403_FORBIDDEN)
 
         if "name_in_game" in data:
-            substitute.name_in_game = data["name_in_game"]
+            if(valid_name(substitute.team.tournament.game, data["name_in_game"])):
+                substitute.name_in_game = data["name_in_game"]
+            else:
+                return Response(
+                    {"name_in_game": _("Pseudo invalide")},
+                    status=status.HTTP_400_BAD_REQUEST
+                )
 
-        substitute.save()
+        try:
+            substitute.save()
+        except Exception as exc:
+            return Response(
+                {"player": str(exc)},
+                status=status.HTTP_400_BAD_REQUEST
+            )
 
         serializer = serializers.SubstituteSerializer(substitute, context={"request": request})