diff --git a/Normalizer/ObjectNormalizer.php b/Normalizer/ObjectNormalizer.php
index 158fa9d5d..53c1e4cb1 100644
--- a/Normalizer/ObjectNormalizer.php
+++ b/Normalizer/ObjectNormalizer.php
@@ -107,23 +107,17 @@ protected function extractAttributes(object $object, string $format = null, arra
             }
         }
 
-        $checkPropertyInitialization = \PHP_VERSION_ID >= 70400;
-
         // properties
+        $propertyValues = !method_exists($object, '__get') ? (array) $object : null;
         foreach ($reflClass->getProperties() as $reflProperty) {
-            $isPublic = $reflProperty->isPublic();
-
-            if ($checkPropertyInitialization) {
-                if (!$isPublic) {
-                    $reflProperty->setAccessible(true);
-                }
-                if (!$reflProperty->isInitialized($object)) {
+            if (null !== $propertyValues && !\array_key_exists($reflProperty->name, $propertyValues)) {
+                if ($reflProperty->isPublic()
+                    || ($reflProperty->isProtected() && !\array_key_exists("\0*\0{$reflProperty->name}", $propertyValues))
+                    || ($reflProperty->isPrivate() && !\array_key_exists("\0{$reflProperty->class}\0{$reflProperty->name}", $propertyValues))
+                ) {
                     unset($attributes[$reflProperty->name]);
-                    continue;
                 }
-            }
 
-            if (!$isPublic) {
                 continue;
             }
 
diff --git a/Normalizer/PropertyNormalizer.php b/Normalizer/PropertyNormalizer.php
index 39e750275..7c333059a 100644
--- a/Normalizer/PropertyNormalizer.php
+++ b/Normalizer/PropertyNormalizer.php
@@ -101,21 +101,17 @@ protected function extractAttributes(object $object, string $format = null, arra
     {
         $reflectionObject = new \ReflectionObject($object);
         $attributes = [];
-        $checkPropertyInitialization = \PHP_VERSION_ID >= 70400;
+        $propertyValues = !method_exists($object, '__get') ? (array) $object : null;
 
         do {
             foreach ($reflectionObject->getProperties() as $property) {
-                if ($checkPropertyInitialization) {
-                    if (!$property->isPublic()) {
-                        $property->setAccessible(true);
-                    }
-
-                    if (!$property->isInitialized($object)) {
-                        continue;
-                    }
-                }
-
-                if (!$this->isAllowedAttribute($reflectionObject->getName(), $property->name, $format, $context)) {
+                if ((null !== $propertyValues && (
+                        ($property->isPublic() && !\array_key_exists($property->name, $propertyValues))
+                        || ($property->isProtected() && !\array_key_exists("\0*\0{$property->name}", $propertyValues))
+                        || ($property->isPrivate() && !\array_key_exists("\0{$property->class}\0{$property->name}", $propertyValues))
+                    ))
+                    || !$this->isAllowedAttribute($reflectionObject->getName(), $property->name, $format, $context)
+                ) {
                     continue;
                 }
 
@@ -123,7 +119,7 @@ protected function extractAttributes(object $object, string $format = null, arra
             }
         } while ($reflectionObject = $reflectionObject->getParentClass());
 
-        return $attributes;
+        return array_unique($attributes);
     }
 
     /**
diff --git a/Tests/Normalizer/ObjectNormalizerTest.php b/Tests/Normalizer/ObjectNormalizerTest.php
index ec9261991..d60571307 100644
--- a/Tests/Normalizer/ObjectNormalizerTest.php
+++ b/Tests/Normalizer/ObjectNormalizerTest.php
@@ -131,6 +131,26 @@ public function testNormalizeObjectWithUninitializedProperties()
         );
     }
 
+    public function testNormalizeObjectWithUnsetProperties()
+    {
+        $obj = new ObjectInner();
+        unset($obj->foo);
+        $this->assertEquals(
+            ['bar' => null],
+            $this->normalizer->normalize($obj, 'any')
+        );
+    }
+
+    public function testNormalizeObjectWithLazyProperties()
+    {
+        $obj = new LazyObjectInner();
+        unset($obj->foo);
+        $this->assertEquals(
+            ['foo' => 123, 'bar' => null],
+            $this->normalizer->normalize($obj, 'any')
+        );
+    }
+
     /**
      * @requires PHP 7.4
      */
@@ -928,6 +948,16 @@ class ObjectInner
     public $bar;
 }
 
+class LazyObjectInner extends ObjectInner
+{
+    public function __get($name)
+    {
+        if ('foo' === $name) {
+            return $this->foo = 123;
+        }
+    }
+}
+
 class FormatAndContextAwareNormalizer extends ObjectNormalizer
 {
     protected function isAllowedAttribute($classOrObject, string $attribute, string $format = null, array $context = []): bool
diff --git a/Tests/Normalizer/PropertyNormalizerTest.php b/Tests/Normalizer/PropertyNormalizerTest.php
index 519d42ff2..c8cfcd3c2 100644
--- a/Tests/Normalizer/PropertyNormalizerTest.php
+++ b/Tests/Normalizer/PropertyNormalizerTest.php
@@ -98,6 +98,26 @@ public function testNormalizeObjectWithUninitializedProperties()
         );
     }
 
+    public function testNormalizeObjectWithUnsetProperties()
+    {
+        $obj = new PropertyDummy();
+        unset($obj->foo);
+        $this->assertEquals(
+            ['bar' => null, 'camelCase' => null],
+            $this->normalizer->normalize($obj, 'any')
+        );
+    }
+
+    public function testNormalizeObjectWithLazyProperties()
+    {
+        $obj = new LazyPropertyDummy();
+        unset($obj->foo);
+        $this->assertEquals(
+            ['foo' => 123, 'bar' => null, 'camelCase' => null],
+            $this->normalizer->normalize($obj, 'any')
+        );
+    }
+
     public function testDenormalize()
     {
         $obj = $this->normalizer->denormalize(
@@ -431,6 +451,16 @@ public function setCamelCase($camelCase)
     }
 }
 
+class LazyPropertyDummy extends PropertyDummy
+{
+    public function __get($name)
+    {
+        if ('foo' === $name) {
+            return $this->foo = 123;
+        }
+    }
+}
+
 class PropertyConstructorDummy
 {
     protected $foo;

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