diff --git a/src/main.py b/src/main.py
index 74480e2..0fdef2c 100644
--- a/src/main.py
+++ b/src/main.py
@@ -251,8 +251,8 @@ def get_winrate(player_name: str | None = None, session: Session = Depends(get_s
     return statistic_to_return
 
 @app.get('/statistics/winrate_over_time', response_model=Union[statistic_classes.TimeLineStatistic, Dict[str,statistic_classes.TimeLineStatistic]])
-def get_winrate_over_time(player_name: str | None = None, day_step: int = 1, session: Session=Depends(get_session)):
-    statistic_to_return = statistic_creator.get_winrate_over_time(session, player_name, day_step)
+def get_winrate_over_time(player_name: str | None = None, day_step: int = 1, boardgame_id: int | None = None, session: Session=Depends(get_session)):
+    statistic_to_return = statistic_creator.get_winrate_over_time(session, player_name, day_step, boardgame_id)
 
     return statistic_to_return
 
diff --git a/src/modules/statistic_creator.py b/src/modules/statistic_creator.py
index fb577ab..b981c2b 100644
--- a/src/modules/statistic_creator.py
+++ b/src/modules/statistic_creator.py
@@ -374,7 +374,7 @@ def get_winrate(session: Session, player_name: str | None = None):
     return statistic_to_return
 
         
-def get_winrate_over_time(session: Session, player_name: str | None = None, day_step = 1) -> Dict[str,statistic_classes.TimeLineStatistic]:
+def get_winrate_over_time(session: Session, player_name: str | None = None, day_step = 1, boardgame_id: int | None = None) -> Dict[str,statistic_classes.TimeLineStatistic]:
 
     statistic_name = 'Player winrate over time'
 
@@ -409,6 +409,8 @@ def get_winrate_over_time(session: Session, player_name: str | None = None, day_
         all_playplayers = [playplayer for playplayer in wanted_player.playplayers]
         all_playplayers.sort(key=lambda x: x.play.play_date)
 
+        all_playplayers = list(filter(lambda playplayer: boardgame_id == None or playplayer.play.boardgame.id == boardgame_id, all_playplayers))
+
         timeline_dict = {}
 
         for current_date in daterange(start_date, date.today(), day_step):