diff --git a/src/solo_turnier/tests/test_worker.py b/src/solo_turnier/tests/test_worker.py
index e7237f8..0bde14b 100644
--- a/src/solo_turnier/tests/test_worker.py
+++ b/src/solo_turnier/tests/test_worker.py
@@ -339,3 +339,22 @@ def test_getAllDancesInCompetitions(fixture_getAllDancesInCompetition):
     dataWorker = worker.DataWorker()
     ret = dataWorker.getAllDancesInCompetitions(data)
     assert ret == fixture_getAllDancesInCompetition[1]
+
+def test_collectPersonsInGroups(mocker):
+    def mockPerson(group):
+        mock = mocker.patch('solo_turnier.worker.ResultPerson')
+        mock.group = group
+        return mock
+    persons = (
+        mockPerson('Kin.'), mockPerson('Kin.'), mockPerson('Jun.'),
+        mockPerson('Kin.'), mockPerson(None), mockPerson('Jug.'),
+        mockPerson(None), mockPerson('Kin./Jun.'), mockPerson('Jun.')
+    )
+    data = {p: [] for p in persons}
+    dataWorker = worker.DataWorker()
+    groups = dataWorker.collectPersonsInGroups(data)
+
+    assert groups['Kin.'] == [persons[0], persons[1], persons[3]]
+    assert groups['Jun.'] == [persons[2], persons[8]]
+    assert groups['Jug.'] == [persons[5]]
+    assert groups['Sonst'] == [persons[4], persons[6], persons[7]]
diff --git a/src/solo_turnier/worker.py b/src/solo_turnier/worker.py
index 118456e..ab511c4 100644
--- a/src/solo_turnier/worker.py
+++ b/src/solo_turnier/worker.py
@@ -233,3 +233,13 @@ class DataWorker:
                 dancesPresent[competition.dance] = True
 
         return [d for d in allDances if dancesPresent[d]]
+
+    def collectPersonsInGroups(self, data:dict[ResultPerson, list[CompetitionResult]]) -> list[tuple[str, list[ResultPerson]]]:
+        groups = {
+            'Kin.': [p for p in data.keys() if p.group == 'Kin.'],
+            'Jun.': [p for p in data.keys() if p.group == 'Jun.'],
+            'Jug.': [p for p in data.keys() if p.group == 'Jug.'],
+        }
+        found = groups['Kin.'] + groups['Jun.'] + groups['Jug.']
+        groups['Sonst'] = [p for p in data.keys() if p not in found]
+        return groups