diff --git a/sentry-android-core/src/test/java/io/sentry/android/core/AndroidSerializerTest.kt b/sentry-android-core/src/test/java/io/sentry/android/core/AndroidSerializerTest.kt
index 45862368a..d13098ee0 100644
--- a/sentry-android-core/src/test/java/io/sentry/android/core/AndroidSerializerTest.kt
+++ b/sentry-android-core/src/test/java/io/sentry/android/core/AndroidSerializerTest.kt
@@ -202,10 +202,6 @@ class AndroidSerializerTest {
 
     private fun generateEmptySentryEvent(): SentryEvent {
         return SentryEvent().apply {
-            setBreadcrumbs(null)
-            setTags(null)
-            setExtra(null)
-            fingerprint = null
             contexts = null
         }
     }
diff --git a/sentry-core/src/main/java/io/sentry/core/SentryClient.java b/sentry-core/src/main/java/io/sentry/core/SentryClient.java
index 5b99de755..c52f0eba8 100644
--- a/sentry-core/src/main/java/io/sentry/core/SentryClient.java
+++ b/sentry-core/src/main/java/io/sentry/core/SentryClient.java
@@ -6,6 +6,9 @@
 import io.sentry.core.transport.AsyncConnection;
 import io.sentry.core.util.Nullable;
 import java.io.IOException;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.Map;
 
 public class SentryClient implements ISentryClient {
   static final String SENTRY_PROTOCOL_VERSION = "7";
@@ -35,6 +38,45 @@ public SentryClient(SentryOptions options, @Nullable AsyncConnection connection)
   public SentryId captureEvent(SentryEvent event, @Nullable Scope scope) {
     log(options.getLogger(), SentryLevel.DEBUG, "Capturing event: %s", event.getEventId());
 
+    if (scope != null) {
+      if (event.getTransaction() == null) {
+        event.setTransaction(scope.getTransaction());
+      }
+      if (event.getUser() == null) {
+        event.setUser(scope.getUser());
+      }
+      if (event.getFingerprint() == null) {
+        event.setFingerprint(scope.getFingerprint());
+      }
+      if (event.getBreadcrumbs() == null) {
+        event.setBreadcrumbs(new ArrayList<>(scope.getBreadcrumbs()));
+      } else {
+        event.getBreadcrumbs().addAll(scope.getBreadcrumbs());
+      }
+      if (event.getTags() == null) {
+        event.setTags(new HashMap<>(scope.getTags()));
+      } else {
+        for (Map.Entry<String, String> item : scope.getTags().entrySet()) {
+          if (!event.getTags().containsKey(item.getKey())) {
+            event.getTags().put(item.getKey(), item.getValue());
+          }
+        }
+      }
+      if (event.getExtra() == null) {
+        event.setExtra(new HashMap<>(scope.getExtra()));
+      } else {
+        for (Map.Entry<String, Object> item : scope.getExtra().entrySet()) {
+          if (!event.getExtra().containsKey(item.getKey())) {
+            event.getExtra().put(item.getKey(), item.getValue());
+          }
+        }
+      }
+      // Level from scope exceptionally take precedence over the event
+      if (scope.getLevel() != null) {
+        event.setLevel(scope.getLevel());
+      }
+    }
+
     for (EventProcessor processor : options.getEventProcessors()) {
       processor.process(event);
     }
diff --git a/sentry-core/src/main/java/io/sentry/core/SentryEvent.java b/sentry-core/src/main/java/io/sentry/core/SentryEvent.java
index 5d729f1f2..9d667eb59 100644
--- a/sentry-core/src/main/java/io/sentry/core/SentryEvent.java
+++ b/sentry-core/src/main/java/io/sentry/core/SentryEvent.java
@@ -27,10 +27,10 @@ public class SentryEvent implements IUnknownPropertiesConsumer {
   private Request request;
   private SdkVersion sdk;
   private Contexts contexts = new Contexts();
-  private List<String> fingerprint = new ArrayList<>();
-  private List<Breadcrumb> breadcrumbs = new ArrayList<>();
-  private Map<String, String> tags = new HashMap<>();
-  private Map<String, Object> extra = new HashMap<>();
+  private List<String> fingerprint;
+  private List<Breadcrumb> breadcrumbs;
+  private Map<String, String> tags;
+  private Map<String, Object> extra;
   private Map<String, Object> unknown;
 
   SentryEvent(SentryId eventId, Date timestamp) {
@@ -199,26 +199,47 @@ public List<Breadcrumb> getBreadcrumbs() {
     return breadcrumbs;
   }
 
-  public void setBreadcrumbs(ArrayList<Breadcrumb> breadcrumbs) {
+  public void setBreadcrumbs(List<Breadcrumb> breadcrumbs) {
     this.breadcrumbs = breadcrumbs;
   }
 
+  public void addBreadcrumb(Breadcrumb breadcrumb) {
+    if (breadcrumbs == null) {
+      breadcrumbs = new ArrayList<>();
+    }
+    breadcrumbs.add(breadcrumb);
+  }
+
   public Map<String, String> getTags() {
     return tags;
   }
 
-  public void setTags(HashMap<String, String> tags) {
+  public void setTags(Map<String, String> tags) {
     this.tags = tags;
   }
 
+  public void setTag(String key, String value) {
+    if (tags == null) {
+      tags = new HashMap<>();
+    }
+    tags.put(key, value);
+  }
+
   public Map<String, Object> getExtra() {
     return extra;
   }
 
-  public void setExtra(HashMap<String, Object> extra) {
+  public void setExtra(Map<String, Object> extra) {
     this.extra = extra;
   }
 
+  public void setExtra(String key, Object value) {
+    if (extra == null) {
+      extra = new HashMap<>();
+    }
+    extra.put(key, value);
+  }
+
   public Contexts getContexts() {
     return contexts;
   }
diff --git a/sentry-core/src/test/java/io/sentry/core/SentryClientTest.kt b/sentry-core/src/test/java/io/sentry/core/SentryClientTest.kt
index 3123639d2..08b76e530 100644
--- a/sentry-core/src/test/java/io/sentry/core/SentryClientTest.kt
+++ b/sentry-core/src/test/java/io/sentry/core/SentryClientTest.kt
@@ -4,6 +4,7 @@ import com.nhaarman.mockitokotlin2.mock
 import com.nhaarman.mockitokotlin2.never
 import com.nhaarman.mockitokotlin2.times
 import com.nhaarman.mockitokotlin2.verify
+import io.sentry.core.protocol.User
 import io.sentry.core.transport.AsyncConnection
 import kotlin.test.Ignore
 import kotlin.test.Test
@@ -156,4 +157,117 @@ class SentryClientTest {
         sut.captureEvent(event)
         assertEquals(expected, event.environment)
     }
+
+    @Test
+    fun `when captureEvent with scope, event should have its data if not set`() {
+        val event = SentryEvent()
+        val scope = createScope()
+
+        val sut = fixture.getSut()
+
+        sut.captureEvent(event, scope)
+        assertEquals("message", event.breadcrumbs[0].message)
+        assertEquals("extra", event.extra["extra"])
+        assertEquals("tags", event.tags["tags"])
+        assertEquals("fp", event.fingerprint[0])
+        assertEquals("transaction", event.transaction)
+        assertEquals("id", event.user.id)
+        assertEquals(SentryLevel.FATAL, event.level)
+    }
+
+    @Test
+    fun `when captureEvent with scope, event data has priority over scope but level and it should append extras, tags and breadcrumbs`() {
+        val event = createEvent()
+
+        val scope = createScope()
+
+        val sut = fixture.getSut()
+
+        sut.captureEvent(event, scope)
+
+        // breadcrumbs are appending
+        assertEquals("eventMessage", event.breadcrumbs[0].message)
+        assertEquals("message", event.breadcrumbs[1].message)
+
+        // extras are appending
+        assertEquals("eventExtra", event.extra["eventExtra"])
+        assertEquals("extra", event.extra["extra"])
+
+        // tags are appending
+        assertEquals("eventTag", event.tags["eventTag"])
+        assertEquals("tags", event.tags["tags"])
+
+        // fingerprint is replaced
+        assertEquals("eventFp", event.fingerprint[0])
+        assertEquals(1, event.fingerprint.size)
+
+        assertEquals("eventTransaction", event.transaction)
+
+        assertEquals("eventId", event.user.id)
+
+        assertEquals(SentryLevel.FATAL, event.level)
+    }
+
+    @Test
+    fun `when captureEvent with scope, event extras and tags are only append if key is absent`() {
+        val event = createEvent()
+
+        val scope = createScope()
+        scope.setExtra("eventExtra", "extra")
+        scope.setTag("eventTag", "tags")
+
+        val sut = fixture.getSut()
+
+        sut.captureEvent(event, scope)
+
+        // extras are appending
+        assertEquals("eventExtra", event.extra["eventExtra"])
+
+        // tags are appending
+        assertEquals("eventTag", event.tags["eventTag"])
+    }
+
+    @Test
+    fun `when captureEvent with scope, event should have its level if set`() {
+        val event = SentryEvent()
+        event.level = SentryLevel.DEBUG
+        val scope = createScope()
+
+        val sut = fixture.getSut()
+
+        sut.captureEvent(event, scope)
+        assertEquals(SentryLevel.FATAL, event.level)
+    }
+
+    private fun createScope(): Scope {
+        return Scope().apply {
+            addBreadcrumb(Breadcrumb().apply {
+                message = "message"
+            })
+            setExtra("extra", "extra")
+            setTag("tags", "tags")
+            fingerprint.add("fp")
+            transaction = "transaction"
+            level = SentryLevel.FATAL
+            user = User().apply {
+                id = "id"
+            }
+        }
+    }
+
+    private fun createEvent(): SentryEvent {
+        return SentryEvent().apply {
+            addBreadcrumb(Breadcrumb().apply {
+                message = "eventMessage"
+            })
+            setExtra("eventExtra", "eventExtra")
+            setTag("eventTag", "eventTag")
+            fingerprint = listOf("eventFp")
+            transaction = "eventTransaction"
+            level = SentryLevel.DEBUG
+            user = User().apply {
+                id = "eventId"
+            }
+        }
+    }
 }