Table:
0
A
B
C
D
E
F
1
Date
Tournament
Tier
Surface
Opponent in the final
Score
2
26 October 1998
Melbourne , Victoria , Australia
ITF
Clay
Toby Mitchell
6–2, 6–4
3
19 November 2001
Australia
ITF
Hard
David McNamara
6–4, 6–2
4
31 July 2006
Germany
ITF
Clay
Nicolas Todero
4–6, 6–4, 7–6 (2)
5
21 August 2006
Netherlands
ITF
Clay
Robin Haase
6–4, 4–6, 6–3
6
19 November 2007
Caloundra , Queensland, Australia
ITF
Hard
Todd Widom
7–6 (2), 7–6 (5)
7
26 November 2007
Brisbane , Queensland, Australia
ITF
Hard
Go Soeda
1–6, 6–0, 6–3

Questions and formulas:
Question: When David McNamara was the opponent in the final, what was the tier?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,E1="david mcnamara"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F7,E2:E7="david mcnamara"),3))
Level: medium