Two officials from Sporting Lisbon were arrested while the club's players were still reeling from being physically attacked by fans at a training session.
The newspaper reported that the investigation, code-named "Cashball", is also looking into underhand payments related to six football matches.
Meanwhile, 23 Sporting Lisbon supporters appeared before the Criminal Court of Barreiro, a town across the River Tagus from Lisbon, accused of assaulting the club's footballers.
Some 50 people broke into Sporting Lisbon's training complex in Alcochete, in the Barreiro district, on Tuesday and attacked a number of Sporting Lisbon footballers.
The players were preparing for a training session ahead of Portugal's Cup Final on Sunday in which Sporting Lisbon face Desportivo das Aves.
The intruders, who claimed to be fans and all had their faces covered, ran across the training pitches and entered the changing rooms, where they allegedly verbally and physically abused players and coaching staff.
Some sources claim players were slapped, punched and headbutted.
The attackers were said to be protesting Sporting Lisbon's poor performance in the final game of the league season on Sunday.
The club have said that the players still intend to play in the cup final on Sunday although they are in a state of shock.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)