Hi Daivat,
Unfortunately there's not a way to do it out of the box. You can query for Opportunities where the user is part of the sales team, or where they're the owner, but you would need to group those conditions as an OR condition and you can't do that with entity links.
If you need to see the data for those two conditions bundled together, I think you'd need to write a report so you can have more flexibility over what you're getting back. FYI, here's the Fetch to get back Opportunities where the current user is on the Sales Team:
<fetch version="1.0" output-format="xml-platform" mapping="logical" distinct="true">
<entity name="opportunity">
<attribute name="name" />
<attribute name="customerid" />
<attribute name="estimatedvalue" />
<attribute name="statuscode" />
<attribute name="opportunityid" />
<order attribute="name" descending="false" />
<link-entity name="connection" from="record1id" to="opportunityid" alias="ak">
<link-entity name="systemuser" from="systemuserid" to="record2id" alias="al">
<filter type="and">
<condition attribute="systemuserid" operator="eq-userid" />
</filter>
</link-entity>
<link-entity name="connectionrole" from="connectionroleid" to="record2roleid" alias="am">
<filter type="and">
<condition attribute="category" operator="eq" value="1001" />
</filter>
</link-entity>
</link-entity>
</entity>
</fetch>
Hope this helps! If so, it would be much appreciated if you could mark this as the verified answer.
Thanks,
Aiden