Just for statistics:

Day/Competition/Tackle/Reds
1 Cup Normal 0
1 Friendly Easy 0
1 Friendly Easy 1
2 Cup Easy 0
2 Friendly Easy 0
3 Friendly Easy 1
3 League Normal 1
3 Champions Normal 0
4 Friendly Easy 0
4 Cup Normal 1
4 League Normal 0
5 Friendly Easy 0
5 Friendly Easy 1
5 League Normal 1
5 Champions Normal 0
6 Friendly Easy 1
6 Friendly Easy 0
6 League Normal 0
6 Cup Normal 1
7 Friendly Easy 0
7 Champions Normal 1
7 League Normal 0
7 Friendly Easy 0
8 Friendly Easy 1
8 Cup Normal 1
8 League Normal 0
9 Friendly Easy 0

Matches with easy takle: 15, reds: 5
Matches with normal takle: 12, reds: 6

Which means that you get very few reds by playing matches, no matter what kind of tackle you set.