Addressed comment

UnitySDK/Assets/ML-Agents/Examples/Tennis/Scripts/TennisAgent.cs

     private Rigidbody ballRb;
     private float invertMult;
 
+    // Looks for the scoreboard based on the name of the gameObjects.
+    // Do not modify the names of the Score GameObjects
+    private const string CanvasName = "Canvas";
+    private const string ScoreBoardAName = "ScoreA";
+    private const string ScoreBoardBName = "ScoreB";
+
-        var canvas = GameObject.Find("Canvas");
+        var canvas = GameObject.Find(CanvasName);
-            scoreBoard = canvas.transform.Find("ScoreB").gameObject;
+            scoreBoard = canvas.transform.Find(ScoreBoardBName).gameObject;
-            scoreBoard = canvas.transform.Find("ScoreA").gameObject;
+            scoreBoard = canvas.transform.Find(ScoreBoardAName).gameObject;
         }
         textComponent = scoreBoard.GetComponent<Text>();
     }