diff --git a/kloppy/domain/models/common.py b/kloppy/domain/models/common.py
index a71f4fca..545d6aae 100644
--- a/kloppy/domain/models/common.py
+++ b/kloppy/domain/models/common.py
@@ -256,5 +256,5 @@ def transform(self, *args, **kwargs):
     def filter(self, filter_fn):
         return replace(
             self,
-            records=[record for record in self.records if filter_fn(record)]
+            records=[record for record in self.records if filter_fn(record)],
         )
diff --git a/kloppy/domain/services/enrichers/__init__.py b/kloppy/domain/services/enrichers/__init__.py
deleted file mode 100644
index c3ef8bcc..00000000
--- a/kloppy/domain/services/enrichers/__init__.py
+++ /dev/null
@@ -1,50 +0,0 @@
-from dataclasses import dataclass
-
-from ...models.tracking import Dataset as TrackingDataset
-from ...models.event import Dataset as EventDataset
-from ...models.common import DatasetFlag, Team, BallState
-
-
-class TrackingPossessionEnricher:
-    def enrich_inplace(
-        self, tracking_dataset: TrackingDataset, event_dataset: EventDataset
-    ) -> None:
-        """
-        Return an enriched tracking data set.
-
-        Use the event data to rebuild game state.
-
-        Iterate through all tracking data events and apply event data to the GameState whenever
-        they happen.
-
-        """
-        if tracking_dataset.flags & (
-            DatasetFlag.BALL_OWNING_TEAM | DatasetFlag.BALL_STATE
-        ):
-            return
-
-        if not event_dataset.flags & (
-            DatasetFlag.BALL_OWNING_TEAM | DatasetFlag.BALL_STATE
-        ):
-            raise Exception(
-                "Event Dataset does not contain ball owning team or ball state information"
-            )
-
-        # set some defaults
-        next_event_idx = 0
-        current_ball_owning_team = None
-        current_ball_state = None
-
-        for frame in tracking_dataset.records:
-            if next_event_idx < len(event_dataset.records):
-                event = event_dataset.records[next_event_idx]
-                if (
-                    frame.period.id == event.period.id
-                    and frame.timestamp >= event.timestamp
-                ):
-                    current_ball_owning_team = event.ball_owning_team
-                    current_ball_state = event.ball_state
-                    next_event_idx += 1
-
-            frame.ball_owning_team = current_ball_owning_team
-            frame.ball_state = current_ball_state