diff --git a/TODO b/TODO
index 84f6b2a..98d109a 100644
--- a/TODO
+++ b/TODO
@@ -11,4 +11,28 @@ db update:
 
 round.is_finals_round
 koppeltabel eventgroup_teams
-tournament.active
\ No newline at end of file
+tournament.active
+
+set search_path to swiss;
+
+ALTER TABLE match
+     ADD counter_id bigint;
+
+;
+
+ALTER TABLE round
+     ADD is_finals_round boolean;
+
+ALTER TABLE round
+ ADD is_final_round boolean DEFAULT (false);
+
+;
+
+ALTER TABLE tournament_player
+     ADD counting boolean;
+
+ALTER TABLE tournament_player
+ ADD counts bigint;
+
+UPDATE tournament_player SET counting = false;
+UPDATE tournament_player SET counts = 0;
\ No newline at end of file
diff --git a/src/main/java/nl/connectedit/swiss/controller/TournamentController.java b/src/main/java/nl/connectedit/swiss/controller/TournamentController.java
index a46d10e..ac76dd6 100755
--- a/src/main/java/nl/connectedit/swiss/controller/TournamentController.java
+++ b/src/main/java/nl/connectedit/swiss/controller/TournamentController.java
@@ -195,4 +195,11 @@ public class TournamentController {
 
         return ResponseEntity.noContent().build();
     }
+
+    @PostMapping("/tournaments/{tournamentId}/players/{playerId}/substitute/{substituteId}")
+    public ResponseEntity<TournamentDto> substitutePlayer(@PathVariable Long tournamentId, @PathVariable Long playerId, @PathVariable Long substituteId) {
+      var tournament = tournamentService.findTournamentById(tournamentId);
+
+      return ResponseEntity.ok(tournamentMapper.toDto(tournamentPlayService.substitutePlayer(tournament, playerId, substituteId)));
+    }
 }
diff --git a/src/main/java/nl/connectedit/swiss/service/TournamentPlayService.java b/src/main/java/nl/connectedit/swiss/service/TournamentPlayService.java
index f80b4fd..d9880c9 100644
--- a/src/main/java/nl/connectedit/swiss/service/TournamentPlayService.java
+++ b/src/main/java/nl/connectedit/swiss/service/TournamentPlayService.java
@@ -183,6 +183,10 @@ public class TournamentPlayService {
     }
   }
 
+  public Tournament substitutePlayer(Tournament tournament, Long playerId, Long substituteId) {
+    return tournament;
+  }
+
   private static class ConflictInDrawException extends RuntimeException {}
 
   private List<Match> tryMatches(List<Team> remainingTeams, Group group) {