Lyon have backed the decision of the French online gaming authority (ARJEL) to run checks on bets placed on the result, which in combination with Ajax's 3-0 defeat to Real Madrid was enough to take the French club into the last 16.

UEFA have yet to receive reports from the match referee or match delegate but say at this stage they have not seen anything which warrants further investigation.

A statement from UEFA released to Press Association Sport read: "UEFA is aware of, and has taken note, of the press coverage surrounding yesterday's games and the various allegations made by the media.

"UEFA also considers the integrity of its own competitions, including the UEFA Champions League, as an absolute priority and pays extra attention to all games.

"We have also implemented a Betting Fraud Detections System (BFDS) as a tool against match-fixing - a system which monitors 29,000 games a season including all UEFA matches, and utilises data from more than 400 betting companies.

"For the time being this system has not shown any irregular betting patterns around yesterday's games or their outcome that would justify any inquiry on that front."