Portuguese champions Porto have been formally accused of fixing two domestic fixtures in the 2003-04 season.
The games in question, against Estrela da Amadora and Beira Mar, took place in the same season the club won the Champions League.
The club said in a statement on their internet site: “FC Porto and their president Jorge Pinto da Costa have been notified by the LPFP of the accusations and investigations concerning matches between FC Porto and Estrela da Amadora, and Beira Mar and FC Porto.”
Porto beat Estrela da Amadora 2-0, while the match at Beira ended in a goalless draw.
The club was managed by Jose Mourinho at the time, although he was not mentioned in the league’s report.
If found guilty, Porto could face a range of punishments, including a points deduction, relegation and fines. Club president Jorge Pinto da Costa risks between a two- and 10-year ban for corruption, or between six months and two years for attempted corruption.
Pinto da Costa is to go to trial in a civil lawsuit by Porto prosecutors after he was accused of bribing the referee of the Beira Mar v Porto game.