Table:
0
A
B
C
D
E
F
G
1
Phase
Round
Clubs remaining
Clubs involved
Winners from previous round
New entries this round
Leagues entering at this round
2
First Phase
First Round
78
36
none
36
Teams from Lega Pro and Serie D
3
First Phase
Second Round
60
40
18
22
Serie B
4
First Phase
Third Round
40
32
20
12
Lowest-ranked Serie A teams
5
First Phase
Fourth Round
24
16
16
none
none
6
Second Phase
Round of 16
16
16
8
8
Highest-ranked Serie A teams
7
Second Phase
Quarter-finals
8
8
8
none
none
8
Second Phase
Semi-finals
4
4
4
none
none
9
Second Phase
Final
2
2
2
none
none

Questions and formulas:
Question: What league is entering this round with 24 clubs remaining?
Formula: LET(query1,SUMMARIZE(G1,SUMX(C1)),FILTER(query1,CHOOSECOLS(query1,2)=24))
Formula2: LET(query1,SUMMARIZE(G2:G9,SUMX(C2:C9)),FILTER(query1,CHOOSECOLS(query1,2)=24))
Level: hard
Question: How many new entries are there for a second phase that has 4 winners from previous rounds?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:G1,(A1="second phase")*(E1=4)),6))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:G9,(A2:A9="second phase")*(E2:E9=4)),6))
Level: medium