diff --git a/CHANGELOG.md b/CHANGELOG.md
index c458ccc..c6788b4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,7 @@
 * BUGFIX: `Tournament::calculateBuchholz()` did not return the correct score when player had unplayed rounds
 * BUGFIX: `Tournament::calculateMutualResult()` returned NULL if result was invalid
 * BUGFIX: `Tournament::calculateBaumbach()` treated bye as won
+* BUGFIX: `Tournament::calculateAverageRating()` returned NaN if no games were played
 
 ## v1.1.2 (Release: 21-jun-2019)
 * ENHANCEMENT: Added update section to dist/readme.md
diff --git a/src/Tournament.php b/src/Tournament.php
index cf06cb7..f5b53be 100644
--- a/src/Tournament.php
+++ b/src/Tournament.php
@@ -650,7 +650,11 @@ class Tournament
         }
         sort($allratings);
         $allratings = array_slice($allratings, $cut);
-        return round(array_sum($allratings) / count($allratings));
+        $tiebreak = 0;
+        if (count($allratings) > 0) {
+            $tiebreak = round(array_sum($allratings) / count($allratings));
+        }
+        return $tiebreak;
     }