Table:
0
A
B
C
D
E
1
Team 1
Agg.
Team 2
1st leg
2nd leg
2
Hotels International FC
0 - 3
Aurora
0 - 0
0 - 3
3
Chicago Croatian
0 - 6
Olimpia
0 - 4
0 - 2
4
Deportivo Suchitepéquez
4 - 1
Águila
2 - 1
2 - 0
5
Vida
3 - 1
FAS
1 - 1
2 - 1
6
América
4 - 2
Guadalajara
3 - 1
1 - 1

Questions and formulas:
Question: What was the 1st leg when Team 2 was Aurora?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,C1="aurora"),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E6,C2:C6="aurora"),4))
Level: medium
Question: What was the 2nd leg when Team 1 was Chicago Croatian?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,A1="chicago croatian"),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E6,A2:A6="chicago croatian"),5))
Level: medium
Question: Who was Team 2 when Team 1 was América?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,A1="américa"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E6,A2:A6="américa"),3))
Level: medium