SSRS Fetch XML report

Hi,

I have developed one matrix report using fetch XML but always seeing one extra row. At the time of design I just set the Row and Column groups and picked the columns that I want to display but when I runt the report seeing additional highlighted row without any header value that I don't need? Am I doing any thing wrong here ? I am unable to hide this as I don't see any thing at design time. Please refer to screen shot and the FetchXML query.

Fetch XML Query:

<fetch version="1.0" output-format="xml-platform" mapping="logical" distinct="false">
  <entity name="connection">
    <attribute name="record2id" alias="Account" />
    <attribute name="record2roleid" alias="ConnectionRole" />
    <attribute name="connectionid" />
    <attribute name="record1id" alias="Opportunity"/>
    <link-entity name="opportunity" from="opportunityid" to="record1id" alias="ab">
      <attribute name="statuscode" />
</link-entity>
  </entity>
</fetch>