Only show divided events that have groups

src/app/components/tournament-manage/tournament-manage.component.html

@@ -46,7 +46,9 @@
                 </button>
               </mat-menu>
             </ng-template>
-            <mat-card *ngFor="let event of tournament.events" appearance="outlined" class="m-3">
+            @for (event of tournament.events; track event) {
+              @if (event.groups.length > 0) {
+                <mat-card appearance="outlined" class="m-3">
                   <mat-card-header>
                     <h6>Indeling {{ TournamentEvent.getType(event.type) }}</h6>
                   </mat-card-header>
@@ -84,6 +86,8 @@
                     </mat-accordion>
                   </mat-card-content>
                 </mat-card>
+              }
+            }
           </mat-tab>
         }