Fix for the tennis Agent. Works with prefab now

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

     public GameObject ball;
     public bool invertX;
     public int score;
-    public GameObject scoreText;
-    public GameObject opponent;
 
     private Text textComponent;
     private Rigidbody agentRb;
     {
         agentRb = GetComponent<Rigidbody>();
         ballRb = GetComponent<Rigidbody>();
-        textComponent = scoreText.GetComponent<Text>();
+        var canvas = GameObject.Find("Canvas");
+        GameObject scoreBoard;
+        if (invertX)
+        {
+            scoreBoard = canvas.transform.Find("ScoreB").gameObject;
+        }
+        else
+        {
+            scoreBoard = canvas.transform.Find("ScoreA").gameObject;
+        }
+        textComponent = scoreBoard.GetComponent<Text>();
     }
 
     public override void CollectObservations()