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It is very difficult, almost impossible to uncover such corruption, but it exists in many leagues.
Last year they discovered in Brazil a bribery scheme for players to do certain actions during the game, so that they could bet and win money.
But they didn't find anything related to the referees.
There is a lot of talk, but they can't prove it.
Going back to the Portuguese championship, as I don't live in Portugal, I don't know how the news are daily, and if it is possible something like this, but in my opinion, from a foreigner, it doesn't make much sense to sell a championship because one day they can find out and lose a lot of things with FIFA and even be relegated or banned from participating in other competitions.
Besides that if you win the championship, you get the prize money.
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For sure the participation in the Champions League affected Benfica's team, especially for having lost the match against Inter, playing in Portugal, we all know that affects the players, and they get more nervous and make more mistakes.
Having 10 points ahead, and now only 4, they are already on alert and I say that they will probably be eliminated from the Champions League and will win again in the Portuguese championship.
The two games against Braga and Sporting will be very difficult, it could be that Benfica and Porto's championship will be decided in those two matches.
I think they will be the best matches to watch and the worst to bet hehehe.
If anyone is sure that Benfica will lose against Estoril, the odds are great to bet on, odds of 22