diff --git a/php/chronotrack_api/fx_chronotrack_admin.php b/php/chronotrack_api/fx_chronotrack_admin.php
index 2618c65..810296a 100644
--- a/php/chronotrack_api/fx_chronotrack_admin.php
+++ b/php/chronotrack_api/fx_chronotrack_admin.php
@@ -650,7 +650,15 @@ function fxChronotrackApiAdminRenderPageScript($intEveId, $arrConfig, $blnClosed
                 var intCurrent = tabMapCurrent[intEprId] || 0;
                 $sel.find('option:not(:first)').remove();
                 $.each(arrRaces, function (_, race) {
-                    var strText = race.label || race.name || 'Course';
+                    // MSIN-4328 — colonne CT : race_name (reg_choice) (ID race_id)
+                    var strName = race.name || 'Course';
+                    var strRc = race.reg_choice_label || '';
+                    var strText = strName;
+                    if (strRc) {
+                        strText += ' (' + strRc + ')';
+                    } else if (race.label && race.label !== strName) {
+                        strText = race.label;
+                    }
                     strText += ' (ID ' + race.ct_race_id + ')';
                     var $opt = $('<option></option>').val(race.ct_race_id).text(strText);
                     $sel.append($opt);
diff --git a/php/chronotrack_api/fx_chronotrack_events.php b/php/chronotrack_api/fx_chronotrack_events.php
index 797752d..7c667de 100644
--- a/php/chronotrack_api/fx_chronotrack_events.php
+++ b/php/chronotrack_api/fx_chronotrack_events.php
@@ -358,6 +358,42 @@ function fxChronotrackApiRegChoiceNamesByRaceId($mixPayload) {
     return $arrByRace;
 }
 
+/**
+ * MSIN-4328 — Filet : déduit race_id → reg_choice_name depuis les entries CT.
+ *
+ * @return array<int, string[]>
+ */
+function fxChronotrackApiRegChoiceNamesFromEntriesPayload($mixPayload) {
+    $arrByRace = array();
+    $arrEntries = fxChronotrackApiNormalizeEntityList($mixPayload, 'entry');
+    if (count($arrEntries) === 0 && is_array($mixPayload) && isset($mixPayload['event']) && is_array($mixPayload['event'])) {
+        $arrEntries = fxChronotrackApiNormalizeEntityList($mixPayload['event'], 'entry');
+    }
+    foreach ($arrEntries as $arrEntry) {
+        if (!is_array($arrEntry)) {
+            continue;
+        }
+        $intRaceId = intval(fxChronotrackApiRaceField($arrEntry, array('race_id', 'event_race_id')));
+        if ($intRaceId <= 0) {
+            continue;
+        }
+        $strName = fxChronotrackApiRaceField($arrEntry, array(
+            'reg_choice_name', 'registration_choice_name', 'choice_name',
+        ));
+        if ($strName === '') {
+            continue;
+        }
+        if (!isset($arrByRace[$intRaceId])) {
+            $arrByRace[$intRaceId] = array();
+        }
+        $arrByRace[$intRaceId][] = $strName;
+    }
+    foreach ($arrByRace as $intRaceId => $arrNames) {
+        $arrByRace[$intRaceId] = array_values(array_unique($arrNames));
+    }
+    return $arrByRace;
+}
+
 /**
  * MSIN-4328 — Ajoute « (reg_choice) » au label de chaque course du mapping.
  */