diff --git a/lib/browser/browser.ts b/lib/browser/browser.ts
index bf01626d7..7ec291cf8 100644
--- a/lib/browser/browser.ts
+++ b/lib/browser/browser.ts
@@ -230,7 +230,7 @@ Zone.__load_patch('XHR', (global: any, Zone: ZoneType) => {
               task.invoke();
             }
           }
-        });
+        }, true);
 
     const abortNative =
         patchMethod(XMLHttpRequestPrototype, 'abort', () => function(self: any, args: any[]) {
@@ -244,13 +244,12 @@ Zone.__load_patch('XHR', (global: any, Zone: ZoneType) => {
               return;
             }
             task.zone.cancelTask(task);
-          } else if ((Zone.current as any)[fetchTaskAborting] === true) {
-            // the abort is called from fetch polyfill, we need to call native abort of XHR.
-            return abortNative!.apply(self, args);
+            return;
           }
           // Otherwise, we are trying to abort an XHR which has not yet been sent, so there is no
-          // task
-          // to cancel. Do nothing.
+          // task to cancel. But we need to use abortNative to abort the XHR in case the send
+          // is called outside of Zone.
+          return abortNative!.apply(self, args);
         });
   }
 });
diff --git a/lib/browser/webapis-media-query.ts b/lib/browser/webapis-media-query.ts
index 7ca46e171..0b96cb670 100644
--- a/lib/browser/webapis-media-query.ts
+++ b/lib/browser/webapis-media-query.ts
@@ -16,7 +16,7 @@ Zone.__load_patch('mediaQuery', (global: any, Zone: ZoneType, api: _ZonePrivate)
       } else {
         return delegate.apply(self, args);
       }
-    });
+    }, true);
   }
 
   function patchRemoveListener(proto: any) {
diff --git a/lib/browser/webapis-resize-observer.ts b/lib/browser/webapis-resize-observer.ts
index 8e7f73643..e22c83319 100644
--- a/lib/browser/webapis-resize-observer.ts
+++ b/lib/browser/webapis-resize-observer.ts
@@ -58,7 +58,7 @@ Zone.__load_patch('ResizeObserver', (global: any, Zone: any, api: _ZonePrivate)
         targets.push(target);
         target[resizeObserverSymbol] = Zone.current;
         return delegate.apply(self, args);
-      });
+      }, true);
 
   api.patchMethod(
       ResizeObserver.prototype, 'unobserve', (delegate: Function) => (self: any, args: any[]) => {
diff --git a/lib/common/events.ts b/lib/common/events.ts
index 4d404b427..6f524d1a4 100644
--- a/lib/common/events.ts
+++ b/lib/common/events.ts
@@ -331,7 +331,9 @@ export function patchEventTarget(
       return function() {
         const target = this || _global;
         let delegate = arguments[1];
-        if (!delegate) {
+        // if handler is not available or we are in root zone
+        // use nativeListener
+        if (!delegate || Zone.current === Zone.root) {
           return nativeListener.apply(this, arguments);
         }
 
@@ -488,6 +490,10 @@ export function patchEventTarget(
     }
 
     proto[REMOVE_EVENT_LISTENER] = function() {
+      const delegate = arguments[1];
+      if (!delegate) {
+        return nativeRemoveEventListener.apply(this, arguments);
+      }
       const target = this || _global;
       const eventName = arguments[0];
       const options = arguments[2];
@@ -503,11 +509,6 @@ export function patchEventTarget(
         capture = options ? !!options.capture : false;
       }
 
-      const delegate = arguments[1];
-      if (!delegate) {
-        return nativeRemoveEventListener.apply(this, arguments);
-      }
-
       if (validateHandler &&
           !validateHandler(nativeRemoveEventListener, delegate, target, arguments)) {
         return;
@@ -553,11 +554,32 @@ export function patchEventTarget(
 
       const listeners: any[] = [];
       const tasks = findEventTasks(target, eventName);
+      const invokes: any[]|null = nativeListeners ? [] : null;
 
       for (let i = 0; i < tasks.length; i++) {
         const task: any = tasks[i];
         let delegate = task.originalDelegate ? task.originalDelegate : task.callback;
         listeners.push(delegate);
+        if (invokes) {
+          invokes.push(task.invoke);
+        }
+      }
+      if (nativeListeners) {
+        const natives = nativeListeners.apply(this, arguments);
+        if (natives && invokes) {
+          natives.forEach((n: any) => {
+            let found = false;
+            for (let i = 0; i < invokes.length; i++) {
+              if (invokes[i] === n) {
+                found = true;
+                break;
+              }
+            }
+            if (!found) {
+              listeners.push(n);
+            }
+          });
+        }
       }
       return listeners;
     };
@@ -580,8 +602,12 @@ export function patchEventTarget(
             this[REMOVE_ALL_LISTENERS_EVENT_LISTENER].call(this, evtName);
           }
         }
-        // remove removeListener listener finally
+        // call native again in case some event handler was not
+        // use patched version of addListener
         this[REMOVE_ALL_LISTENERS_EVENT_LISTENER].call(this, 'removeListener');
+        if (nativeRemoveAllListeners) {
+          nativeRemoveAllListeners.call(this);
+        }
       } else {
         const symbolEventNames = zoneSymbolEventNames[eventName];
         if (symbolEventNames) {
@@ -609,6 +635,10 @@ export function patchEventTarget(
             }
           }
         }
+
+        if (nativeRemoveAllListeners) {
+          nativeRemoveAllListeners.call(this, eventName);
+        }
       }
 
       if (returnTarget) {
diff --git a/lib/common/fetch.ts b/lib/common/fetch.ts
index 5fda7a5ab..9edaa6b69 100644
--- a/lib/common/fetch.ts
+++ b/lib/common/fetch.ts
@@ -36,6 +36,10 @@ Zone.__load_patch('fetch', (global: any, Zone: ZoneType, api: _ZonePrivate) => {
   }
   const placeholder = function() {};
   global['fetch'] = function() {
+    // if in root zone, just use native fetch directly.
+    if (Zone.current === Zone.root) {
+      return fetch.apply(this, arguments);
+    }
     const args = Array.prototype.slice.call(arguments);
     const options = args.length > 1 ? args[1] : null;
     const signal = options && options.signal;
@@ -97,4 +101,4 @@ Zone.__load_patch('fetch', (global: any, Zone: ZoneType, api: _ZonePrivate) => {
       }
     });
   };
-});
\ No newline at end of file
+});
diff --git a/lib/common/timers.ts b/lib/common/timers.ts
index ccf53aaba..da24bb047 100644
--- a/lib/common/timers.ts
+++ b/lib/common/timers.ts
@@ -99,7 +99,7 @@ export function patchTimer(window: any, setName: string, cancelName: string, nam
           // cause an error by calling it directly.
           return delegate.apply(window, args);
         }
-      });
+      }, true);
 
   clearNative =
       patchMethod(window, cancelName, (delegate: Function) => function(self: any, args: any[]) {
diff --git a/lib/common/utils.ts b/lib/common/utils.ts
index 77554e524..a23177bf0 100644
--- a/lib/common/utils.ts
+++ b/lib/common/utils.ts
@@ -389,7 +389,8 @@ export function setShouldCopySymbolProperties(flag: boolean) {
 export function patchMethod(
     target: any, name: string,
     patchFn: (delegate: Function, delegateName: string, name: string) => (self: any, args: any[]) =>
-        any): Function|null {
+        any,
+    checkInZone = false): Function|null {
   let proto = target;
   while (proto && !proto.hasOwnProperty(name)) {
     proto = ObjectGetPrototypeOf(proto);
@@ -409,6 +410,10 @@ export function patchMethod(
     if (isPropertyWritable(desc)) {
       const patchDelegate = patchFn(delegate!, delegateName, name);
       proto[name] = function() {
+        // if we are in root zone, just use native delegate.
+        if (checkInZone && Zone.current === Zone.root && delegate) {
+          return delegate.apply(this, arguments);
+        }
         return patchDelegate(this, arguments as any);
       };
       attachOriginToPatched(proto[name], delegate);
@@ -449,7 +454,7 @@ export function patchMacroTask(
       // cause an error by calling it directly.
       return delegate.apply(self, args);
     }
-  });
+  }, true);
 }
 
 export interface MicroTaskMeta extends TaskData {
@@ -480,7 +485,7 @@ export function patchMicroTask(
       // cause an error by calling it directly.
       return delegate.apply(self, args);
     }
-  });
+  }, true);
 }
 
 export function attachOriginToPatched(patched: Function, original: any) {
diff --git a/lib/zone.ts b/lib/zone.ts
index 4de4e077d..5ce0986ec 100644
--- a/lib/zone.ts
+++ b/lib/zone.ts
@@ -327,7 +327,8 @@ interface _ZonePrivate {
   patchMethod:
       (target: any, name: string,
        patchFn: (delegate: Function, delegateName: string, name: string) =>
-           (self: any, args: any[]) => any) => Function | null;
+           (self: any, args: any[]) => any,
+       checkInZone?: boolean) => Function | null;
   bindArguments: (args: any[], source: string) => any[];
 }
 
@@ -710,7 +711,6 @@ const Zone: ZoneType = (function(global: any) {
       return this._name;
     }
 
-
     private _parent: Zone|null;
     private _name: string;
     private _properties: {[key: string]: any};
@@ -752,6 +752,9 @@ const Zone: ZoneType = (function(global: any) {
       const _callback = this._zoneDelegate.intercept(this, callback, source);
       const zone: Zone = this;
       return function() {
+        if (zone === rootZone) {
+          return _callback.apply(this, arguments);
+        }
         return zone.runGuarded(_callback, (this as any), <any>arguments, source);
       } as any as T;
     }
@@ -1352,7 +1355,8 @@ const Zone: ZoneType = (function(global: any) {
       }
     },
   };
-  let _currentZoneFrame: _ZoneFrame = {parent: null, zone: new Zone(null, null)};
+  const rootZone = new Zone(null, null);
+  let _currentZoneFrame: _ZoneFrame = {parent: null, zone: rootZone};
   let _currentTask: Task|null = null;
   let _numberOfNestedTaskFrames = 0;