French online gaming authority (ARJEL) have opened a probe into the 7-1 victory by Lyon in their Champions League game against Croatian side Dinamo Zagreb, a spokesman told AFP on Thursday.
ARJEL are "currently carrying out checks" on the match in Zagreb on Wednesday night which gave the French side a surprise ticket to the last 16 of the competition at the expense of Dutch side Ajax.
It was a remarkable rescue for Lyon who went into their final Group D game three points behind Ajax and needing to make up a goal difference of seven if they were to reach the knockout rounds.
French international striker Bafetimbi Gomis was the star of the show, scoring four goals, including the fastest ever Champions League hat-trick as Lyon took second place in the group.