diff --git a/packages/opentelemetry-exporter-zipkin/test/common/transform.test.ts b/packages/opentelemetry-exporter-zipkin/test/common/transform.test.ts
index 4df7f73f6c..f0e662389e 100644
--- a/packages/opentelemetry-exporter-zipkin/test/common/transform.test.ts
+++ b/packages/opentelemetry-exporter-zipkin/test/common/transform.test.ts
@@ -236,6 +236,40 @@ describe('transform', () => {
         version: '1',
       });
     });
+    it('should map OpenTelemetry constructor attributes to a Zipkin tag',()=>{
+      const span = new Span(
+        tracer,
+        api.ROOT_CONTEXT,
+        'my-span',
+        spanContext,
+        api.SpanKind.SERVER,
+        parentId,
+        [],
+        undefined,
+        undefined,
+        {
+          key1: 'value1',
+          key2: 'value2',
+        }
+      );
+      const tags: zipkinTypes.Tags = _toZipkinTags(
+        span,
+        defaultStatusCodeTagName,
+        defaultStatusErrorTagName
+      );
+
+      assert.deepStrictEqual(tags, {
+        key1: 'value1',
+        key2: 'value2',
+        [SemanticResourceAttributes.SERVICE_NAME]: 'zipkin-test',
+        'telemetry.sdk.language': language,
+        'telemetry.sdk.name': 'opentelemetry',
+        'telemetry.sdk.version': VERSION,
+        cost: '112.12',
+        service: 'ui',
+        version: '1',
+      });
+    })
     it('should map OpenTelemetry SpanStatus.code to a Zipkin tag', () => {
       const span = new Span(
         tracer,
diff --git a/packages/opentelemetry-sdk-trace-base/src/Span.ts b/packages/opentelemetry-sdk-trace-base/src/Span.ts
index 31fb1555ac..de076d6aea 100644
--- a/packages/opentelemetry-sdk-trace-base/src/Span.ts
+++ b/packages/opentelemetry-sdk-trace-base/src/Span.ts
@@ -100,13 +100,17 @@ export class Span implements APISpan, ReadableSpan {
     parentSpanId?: string,
     links: Link[] = [],
     startTime?: TimeInput,
-    _deprecatedClock?: unknown // keeping this argument even though it is unused to ensure backwards compatibility
+    _deprecatedClock?: unknown, // keeping this argument even though it is unused to ensure backwards compatibility
+    initAttributes?:SpanAttributes
   ) {
     this.name = spanName;
     this._spanContext = spanContext;
     this.parentSpanId = parentSpanId;
     this.kind = kind;
     this.links = links;
+    if(initAttributes){
+      this.setAttributes(initAttributes);
+    }
 
     const now = Date.now();
     this._performanceStartTime = otperformance.now();
diff --git a/packages/opentelemetry-sdk-trace-base/src/Tracer.ts b/packages/opentelemetry-sdk-trace-base/src/Tracer.ts
index b77a9427ec..972c226453 100644
--- a/packages/opentelemetry-sdk-trace-base/src/Tracer.ts
+++ b/packages/opentelemetry-sdk-trace-base/src/Tracer.ts
@@ -132,6 +132,12 @@ export class Tracer implements api.Tracer {
       return nonRecordingSpan;
     }
 
+    // Set initial span attributes. The attributes object may have been mutated
+    // by the sampler, so we sanitize the merged attributes before setting them.
+    const initAttributes = sanitizeAttributes(
+      Object.assign(attributes, samplingResult.attributes)
+    );
+
     const span = new Span(
       this,
       context,
@@ -140,14 +146,10 @@ export class Tracer implements api.Tracer {
       spanKind,
       parentSpanId,
       links,
-      options.startTime
-    );
-    // Set initial span attributes. The attributes object may have been mutated
-    // by the sampler, so we sanitize the merged attributes before setting them.
-    const initAttributes = sanitizeAttributes(
-      Object.assign(attributes, samplingResult.attributes)
+      options.startTime,
+      initAttributes
     );
-    span.setAttributes(initAttributes);
+    
     return span;
   }
 
diff --git a/packages/opentelemetry-sdk-trace-base/test/common/Span.test.ts b/packages/opentelemetry-sdk-trace-base/test/common/Span.test.ts
index 11a94ffc7c..e51254291a 100644
--- a/packages/opentelemetry-sdk-trace-base/test/common/Span.test.ts
+++ b/packages/opentelemetry-sdk-trace-base/test/common/Span.test.ts
@@ -1222,5 +1222,64 @@ describe('Span', () => {
         });
       });
     });
+
+    describe('when attributes are added in constructor', () => {
+      it('should not map undefined value', () => {
+        const span = new Span(
+          tracer,
+          ROOT_CONTEXT,
+          name,
+          spanContext,
+          SpanKind.CLIENT
+        );
+          assert.deepStrictEqual(span.attributes,{});
+      });
+
+      it('should map correctly sent keys', () => {
+        const span = new Span(
+          tracer,
+          ROOT_CONTEXT,
+          name,
+          spanContext,
+          SpanKind.CLIENT,
+          "",
+          [],
+          undefined,
+          undefined,
+          {
+            "key1":"value",
+            "key2":"value"
+          }
+        );
+          assert.deepStrictEqual(span.attributes,{
+            "key1":"value",
+            "key2":"value"
+          });
+      });
+
+      it('should correctly map new keys set ', () => {
+        const span = new Span(
+          tracer,
+          ROOT_CONTEXT,
+          name,
+          spanContext,
+          SpanKind.CLIENT,
+          "",
+          [],
+          undefined,
+          undefined,
+          {
+            "key1":"value",
+            "key2":"value"
+          }
+        );
+        span.setAttributes({"key3":"value"});
+          assert.deepStrictEqual(span.attributes,{
+            "key1":"value",
+            "key2":"value",
+            "key3":"value"
+          });
+      });
+    });
   });
 });