diff --git a/java/com.sap.sailing.domain.common/src/com/sap/sailing/domain/common/dto/FleetDTO.java b/java/com.sap.sailing.domain.common/src/com/sap/sailing/domain/common/dto/FleetDTO.java
index 5b62e59afd4..a929e12c093 100644
--- a/java/com.sap.sailing.domain.common/src/com/sap/sailing/domain/common/dto/FleetDTO.java
+++ b/java/com.sap.sailing.domain.common/src/com/sap/sailing/domain/common/dto/FleetDTO.java
@@ -11,6 +11,7 @@ public class FleetDTO extends NamedDTO {
     public RaceLogTrackingState raceLogTrackingState;
     public boolean raceLogTrackerExists;
     public boolean courseDefinitionInRaceLog;
+    public boolean competitorRegistrationsExist;
     
     public FleetDTO() {}
 
diff --git a/java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/adminconsole/RaceLogTrackingEventManagementPanel.java b/java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/adminconsole/RaceLogTrackingEventManagementPanel.java
index dfe2e7a3a0b..f22edf8b494 100644
--- a/java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/adminconsole/RaceLogTrackingEventManagementPanel.java
+++ b/java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/adminconsole/RaceLogTrackingEventManagementPanel.java
@@ -295,6 +295,21 @@ public class RaceLogTrackingEventManagementPanel extends AbstractLeaderboardConf
     
     private void startTracking(Set<RaceColumnDTOAndFleetDTOWithNameBasedEquality> races) {
         final StrippedLeaderboardDTO leaderboard = getSelectedLeaderboard();
+        
+        //prompt user if competitor registrations are missing for same races
+        String namesOfRacesMissingRegistrations = "";
+        for (RaceColumnDTOAndFleetDTOWithNameBasedEquality race : races) {
+            if (! race.getB().competitorRegistrationsExist) {
+                namesOfRacesMissingRegistrations += race.getA().getName() + "/" + race.getB().getName() + " ";
+            }
+        }
+        if (! namesOfRacesMissingRegistrations.isEmpty()) {
+            boolean proceed = Window.confirm(stringMessages.competitorRegistrationsMissingProceed(
+                    namesOfRacesMissingRegistrations));
+            if (! proceed) {
+                return;
+            }
+        }
 
         for (RaceColumnDTOAndFleetDTOWithNameBasedEquality race : races) {
             final RaceColumnDTO raceColumn = race.getA();
diff --git a/java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/client/StringMessages.java b/java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/client/StringMessages.java
index 261a821ee06..46964f27fb2 100755
--- a/java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/client/StringMessages.java
+++ b/java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/client/StringMessages.java
@@ -1006,4 +1006,5 @@ public interface StringMessages extends Messages {
     String authorName();
     String authorPriority();
     String removeDenotation();
+    String competitorRegistrationsMissingProceed(String namesOfRaces);
 }
diff --git a/java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/client/StringMessages.properties b/java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/client/StringMessages.properties
index ed8fcf2e490..1024e4412b1 100755
--- a/java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/client/StringMessages.properties
+++ b/java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/client/StringMessages.properties
@@ -991,4 +991,5 @@ importWind=Import Wind
 importWindTooltip=Unchecking this option will drastically lower the amount of data transfered.
 authorName=Author name
 authorPriority=Author priority
-removeDenotation=Remove Denotation
\ No newline at end of file
+removeDenotation=Remove Denotation
+competitorRegistrationsMissingProceed=At least one of the selected races ({0}) is missing competitor registrations. Proceed anyway?
\ No newline at end of file
diff --git a/java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/client/StringMessages_de.properties b/java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/client/StringMessages_de.properties
index f3957eda5fb..3fed08c40da 100755
--- a/java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/client/StringMessages_de.properties
+++ b/java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/client/StringMessages_de.properties
@@ -987,4 +987,5 @@ importWind=Wind importieren
 importWindTooltip=Diese Option zu deselektieren führt zu einer wesentlich kleineren übertragenen Datenmenge.
 authorName=Benutzername
 authorPriority=Benutzer-Priorität
-removeDenotation=Markierung entfernen
\ No newline at end of file
+removeDenotation=Markierung entfernen
+competitorRegistrationsMissingProceed=Für mindestens eins der Rennen ({0}) sind keine Teams registriert. Trotzdem fortfahren?
\ No newline at end of file
diff --git a/java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/server/SailingServiceImpl.java b/java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/server/SailingServiceImpl.java
index c6827c08a90..63f1c41ab15 100755
--- a/java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/server/SailingServiceImpl.java
+++ b/java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/server/SailingServiceImpl.java
@@ -2059,6 +2059,8 @@ public class SailingServiceImpl extends ProxiedRemoteServiceServlet implements S
                 fleetDTO.courseDefinitionInRaceLog = raceLogTrackingState.isForTracking() ?
                         new LastPublishedCourseDesignFinder(raceLog).analyze() != null : false;
                 
+                fleetDTO.competitorRegistrationsExist = ! new RegisteredCompetitorsAnalyzer(raceLog).analyze().isEmpty();
+                
                 if (! raceLogTrackingState.isForTracking()) {
                     oneRaceLogDenotableForTracking = true;
                 }