Hungarian side Debrecen say allegations of match-fixing during their 2009 Champions League tie against Liverpool have already been dealt with.
Danish newspaper Ekstra Bladet has reported that Liverpool's 1-0 defeat of Debrecen at Anfield is among 680 suspicious games which are being investigated by European anti-crime agency Europol.
The Danish report says match fixers plotting to make money on the total goals betting market targeted Debrecen's Montenegrin goalkeeper Vukasin Poleksic.
But Liverpool, who are not under suspicion, say they have not heard from Europol, and Debrecen say the allegations have been handled by European football's governing body UEFA.
Poleksic was given a two-year ban in 2010 for failing to report approaches from alleged fixers ahead of matches against Liverpool and Serie A side Fiorentina, and Debrecen say neither they nor the player will react to the new allegations.
Instead they republished a 2010 statement which read: "In the view of the UEFA Disciplinary Committee, Vukasin Poleksic failed to comply with his duties when he did not report to Debrecen that, before two Champions League matches, unknown people tried to persuade him to influence the result.
"The investigation revealed that Poleksic rejected the requests. Furthermore, the probe found that the matches were not influenced by anything connected with the bribery.
"But the player committed an error by failing to inform the authorities immediately, therefore he was punished for not meeting the reporting requirement."
The case came before the Court of Arbitration for Sport (CAS) in 2011 and CAS said there was no evidence that matches had been manipulated.