diff --git a/OpenRA.Game/Network/FrameData.cs b/OpenRA.Game/Network/FrameData.cs
index bbc1226696..e3e4d2c635 100755
--- a/OpenRA.Game/Network/FrameData.cs
+++ b/OpenRA.Game/Network/FrameData.cs
@@ -34,12 +34,17 @@ namespace OpenRA.Network
 			frameData.Add( clientId, orders );
 		}
 
-		public bool IsReadyForFrame( int frame )
-		{
-			var frameData = framePackets.GetOrAdd( frame );
-			return ClientsPlayingInFrame( frame )
-				.All( client => frameData.ContainsKey( client ) );
-		}
+        public bool IsReadyForFrame(int frame)
+        {
+            return !ClientsNotReadyForFrame(frame).Any();
+        }
+
+        public IEnumerable<int> ClientsNotReadyForFrame(int frame)
+        {
+            var frameData = framePackets.GetOrAdd(frame);
+            return ClientsPlayingInFrame(frame)
+                .Where(client => !frameData.ContainsKey(client));
+        }
 
 		public IEnumerable<ClientOrder> OrdersForFrame( World world, int frame )
 		{
diff --git a/OpenRA.Game/Network/OrderManager.cs b/OpenRA.Game/Network/OrderManager.cs
index 5dadc2a17a..1c34dcc57c 100755
--- a/OpenRA.Game/Network/OrderManager.cs
+++ b/OpenRA.Game/Network/OrderManager.cs
@@ -155,7 +155,19 @@ namespace OpenRA.Network
 		public bool IsReadyForNextFrame
 		{
 			get { return NetFrameNumber >= 1 && frameData.IsReadyForFrame( NetFrameNumber ); }
-		}
+		}
+
+        static readonly IEnumerable<Session.Client> NoClients = new Session.Client[] {};
+        public IEnumerable<Session.Client> GetClientsNotReadyForNextFrame
+        {
+            get
+            {
+                return NetFrameNumber >= 1
+                    ? frameData.ClientsNotReadyForFrame(NetFrameNumber)
+                        .Select(a => LobbyInfo.ClientWithIndex(a))
+                    : NoClients;
+            }
+        }
 
 		public void Tick()
 		{