diff --git a/front/model/tactic/Ball.ts b/front/model/tactic/Ball.ts
deleted file mode 100644
index 28e4830..0000000
--- a/front/model/tactic/Ball.ts
+++ /dev/null
@@ -1,17 +0,0 @@
-export type CourtObject = { type: "ball" } & Ball
-
-export interface Ball {
-    /**
-     * The ball is a "ball" court object
-     */
-    readonly type: "ball"
-
-    /**
-     * Percentage of the player's position to the bottom (0 means top, 1 means bottom, 0.5 means middle)
-     */
-    readonly bottomRatio: number
-    /**
-     * Percentage of the player's position to the right (0 means left, 1 means right, 0.5 means middle)
-     */
-    readonly rightRatio: number
-}
diff --git a/front/model/tactic/CourtObjects.ts b/front/model/tactic/CourtObjects.ts
index 28e4830..56316d2 100644
--- a/front/model/tactic/CourtObjects.ts
+++ b/front/model/tactic/CourtObjects.ts
@@ -1,6 +1,6 @@
-export type CourtObject = { type: "ball" } & Ball
+export type CourtObject = { type: "ball" } & CourtObjects
 
-export interface Ball {
+export interface CourtObjects {
     /**
      * The ball is a "ball" court object
      */