Table:
0
A
B
C
D
E
1
Date
Tournament
Surface
Opponent in Final
Score in Final
2
21 April 1986
Nice, France
Clay
Paul McNamee
6–1, 6–3
3
12 May 1986
Munich, West Germany
Clay
Ricki Osterthun
6–1, 6–3
4
28 July 1986
Båstad, Sweden
Clay
Mats Wilander
7–6(5), 4–6, 6–4
5
13 July 1987
Gstaad, Switzerland
Clay
Ronald Agénor
6–2, 6–3, 7–6(5)
6
20 July 1987
Bordeaux, France
Clay
Ronald Agénor
5–7, 6–4, 6–4
7
10 August 1987
Kitzbühel, Austria
Clay
Miloslav Mečíř
6–4, 6–1, 4–6, 6–1
8
21 September 1987
Madrid, Spain
Clay
Javier Sánchez
6–3, 3–6, 6–2
9
1 August 1988
Hilversum, Netherlands
Clay
Guillermo Pérez-Roldán
6–3, 6–1, 3–6, 6–3
10
7 August 1989
Kitzbühel, Austria
Clay
Martín Jaite
7–6(1), 6–1, 2–6, 6–2
11
8 January 1990
Wellington, New Zealand
Hard
Richey Reneberg
6–7(3), 6–4, 4–6, 6–4, 6–1
12
9 April 1990
Estoril, Portugal
Clay
Franco Davín
6–3, 6–1
13
15 April 1991
Barcelona, Spain
Clay
Sergi Bruguera
6–4, 7–6(7), 6–2
14
20 May 1991
Rome, Italy
Clay
Alberto Mancini
6–3, 6–1, 3–0, ret.
15
15 July 1991
Gstaad, Switzerland
Clay
Sergi Bruguera
6–1, 6–4, 6–4
16
13 January 1992
Sydney Outdoor, Australia
Hard
Guy Forget
6–3, 6–4

Questions and formulas:
Question: What is Date, when Opponent in Final is "Guy Forget"?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,D1="guy forget"),1))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E16,D2:D16="guy forget"),1))
Level: medium
Question: What is Opponent in Final, when Date is "13 January 1992"?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,A1="13 january 1992"),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E16,A2:A16="13 january 1992"),4))
Level: medium
Question: What is Opponent in Final, when Surface is "Hard", and when Date is "13 January 1992"?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,(C1="hard")*(A1="13 january 1992")),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E16,(C2:C16="hard")*(A2:A16="13 january 1992")),4))
Level: medium