Red Star Belgrade, Liverpool’s next opponents in the Champions League, are at the centre of a match-fixing investigation amid claims a representative of the Serbian club bet €5 million on them to lose by five goals in last week’s 6-1 defeat by Paris-Saint Germain.

The French authorities are looking into the allegations, which arise from the group C encounter at Parc des Princes, after being alerted before the game by Uefa.

It is claimed an informant tipped Uefa off that a Red Star official, working with accomplices, would bet just under €5 million (about £4.4 million) on the Serbs losing by five goals across multiple websites to try not to raise suspicion.

Members of Red Star’s starting line-up are alleged to have been in on