Some of the top names in Turkish football are set to face judges near Istanbul as nearly 100 people go on trial accused of match-fixing.
Aziz Yildirim, the president of Fenerbahce, one of Turkey's leading clubs, and 92 other suspects are charged in the scandal.
Nineteen of last season's league matches are said to have been affected.
Hundreds of Fenerbahce fans protested outside the court against any penalty the club might face.
"The government might collapse, inflation might go down, but Fenerbahce can never be relegated," the fans chanted, according to AP.
The Istanbul club won the league title last year but were barred from the European Champions League because of the alleged involvement in the match-fixing scandal.
The suspects in the trial include players and managers from several major clubs as well as Fenerbahce.
Twenty-three of them are currently in prison, including Mr Yildirim.