diff --git a/utils/spielplan-filter.js b/utils/spielplan-filter.js
index 85ea2f0..20462c2 100644
--- a/utils/spielplan-filter.js
+++ b/utils/spielplan-filter.js
@@ -66,8 +66,8 @@ function parseJugendTeamKey(teamKey) {
 
 function sideMatchesJugendTeam({ isHarheimer, ageClass, teamNumber }, team) {
   if (!isHarheimer) return false
-  const agePattern = new RegExp(`(?:jugend\\s*|j)${team.age}\\b`, 'i')
-  if (!agePattern.test(ageClass)) return false
+  const ageMatch = String(ageClass || '').match(/(?:jugend\s*|j)(\d{1,2})\b/i)
+  if (!ageMatch || ageMatch[1] !== team.age) return false
   return !team.teamNumber || String(teamNumber || '').trim() === team.teamNumber
 }