Traceability matrix cannot see requirements/story which do not have any test case yet

Traceability matrix cannot see requirements/story which do not have any test case yet

For example I have following requirements/story and test cases

Requirements: R1, R2, R3

Test Cases: T1 (link with R1), T2 (link with R2), T3 (no link)

When view the traceability report, I see only

Requirement     Test Case

-----------------------------------

R1                        T1

R2                        T2

I expect report should look like

Requirement     Test Case

-----------------------------------

R1                        T1

R2                        T2

R3                        N/A

N/A                      T3

So that I can create test case for requirement R3 or link T3 to R3 if I realize that T3 is actually created for testing R3.