Savresh can create issues and assign them to anyone in the Testers group.

Savresh needs Assignable User permission. This permission determines which users can be assigned to issues in a project1. If Savresh does not have this permission, they will not be able to re-assign issues to themselves, even if they can create and assign issues to others.

Testers need Assign Issues permission. This permission determines which users can assign issues to other users or to themselves1. If the Testers group does nothave this permission, they will not be able to re-assign issues to anyone, including Savresh.