Fix crash

tournaments/models/match.py

@@ -348,6 +348,15 @@ class Match(SideStoreModel):
         return format_seconds(self.smart_time_played())
 
     def smart_time_played(self):
+        if self.start_date:
+            if self.end_date:
+                return self.__smart_duration()
+            else:
+                return (timezone.now() - self.start_date).total_seconds()
+        else:
+            return 0
+
+    def __smart_duration(self):
         seconds = (self.end_date - self.start_date).total_seconds()
         average_duration = self.average_seconds_duration()