FIFA has said there has been no evidence that match-fixing has taken place at the World Cup.
German publication Der Spiegel claimed that convicted match-fixer Wilson Raj Perumal correctly called the outcome of Croatia's 4-0 win over Cameroon in the group stages of the Brazil showpiece in a conversation on Facebook with the magazine.
Der Spiegel also claimed that Perumal indicated to them a Cameroon player would be sent off in the first half, with Alex Song subsequently dismissed five minutes before the break.
For his part, Perumal has strenously denied those suggestions, while Der Spiegel continue to stand by their report.
But at a news conference on Wednesday, the world governing body called on the magazine to bring forward evidence to support the allegations.
FIFA's head of media, Delia Fischer, told a news conference in Rio: "We have requested Der Spiegel to provide us with all the communications with Perumal and any other material in order to prove the allegations they have made.
"So far we have no evidence of any match manipulation on the betting market. The media and other stakeholders should not call people's or organisation's credibility into question just for headlines.
"It is really important to make sure that information is handled with the necessary respect and care."
In his statement, Perumal said: "Contrary to the 'revelations' published by the German weekly Der Spiegel that were picked up by news outlets worldwide, I did not predict the result of the Cameroon v Croatia match played on June 18, 2014.
"The Facebook chat with the Der Spiegel journalist took place a few days after the match – 21 June, as confirmed by my Facebook log – and was but an informal assessment of the behaviour of the Cameroon team at the Brazil 2014 World Cup after they had played two of their three group stages matches, including the one with Croatia.
"At no time did I make reference to four goals being scored or to a red card being issued.
"At no time did I suggest that I had any way of corroborating or substantiating what was meant to be an educated guess based on my extensive match-fixing experience.
"I am shocked and amazed that a respected magazine such as Der Spiegel would go so far as to fabricate statements by yours truly with the visible aim of stirring the row over match-fixing.
"I apologise to the Cameroon FA and to its fans if I inadvertently offended them. It was not my intention."
The Cameroon Football Federation (FECAFOOT) confirmed earlier this week it had launched an investigation into the claims.
|Strinic close to finalising Napoli switch|
|Torres to join Milan on permanent deal|
|Scottish Premiership Review: Celtic held to shock draw, rivals fail to capitalise|
|Wenger sings Song´s praises|
|Pochettino calls for bravery|
|West Ham could lose Allardyce - Sullivan|
|League One Preview: Saunders takes charge for Colchester clash|
|Aguirre denies any involvement in La Liga match-fixing scandal|
|Mourinho impressed by Koeman´s Southampton|
|QPR v Crystal Palace: Millen recast in familiar role|
|West Ham v Arsenal: Allardyce eyes further home comfort|
|Elusive Coppa Italia on Juventus´ wish list - Marotta|
|Jones eyes swift response|
|Millen focused on QPR clash|
|League Two Preview: Shrewsbury, Wycombe and Burton vie for year-end top spot|
|Mancini not expecting big-money signings at Inter|
|Tottenham v Manchester United: Carrick expects tough return|
|Pearson eager to see Leicester resolve|
|Newcastle United v Everton: Martinez demands clinical touch|
|Liverpool v Swansea City: Rodgers backs returning Mignolet|
|Bayern can still improve - Sammer|
|Warnock sacked by Palace|
|Aston Villa v Sunderland: No club too big to go down, says Lambert|
|Hull City v Leicester City: Pearson vows to keep going|
|Stoke City v West Brom: Hughes targets elusive back-to-back wins|
|Rodgers dismisses Balotelli exit rumours|
|Modric will not rush Madrid return|
|Dyche pleased with Vokes return|
|Southampton v Chelsea: Koeman vows to go on the offensive|
|A-League Review: Six-goal Gosford thriller, Victory leave it late|
|Manchester City v Burnley: Pellegrini warns against complacency|
|Dortmund can fight on two fronts - Watzke|
|Sterling hails improved Liverpool belief|
|Rosicky eager to build on QPR winner|
|Wenger: ´We made it hard for ourselves´|
|Kane: Spurs eye top four|
|Di Maria in doubt for Spurs clash|
|Ba left out of Senegal AFCON squad|
|Redknapp frustrated by penalty call|
|Wenger sees Giroud wrongs|
|Premier League schedule a ´disgrace´, says Poyet|
|Championship Review: Bournemouth stay top, Heskey scores on Bolton debut|
|Hughes lauds Bojan performance|
|Koeman: Saints marching on|
|Pardew rues referee error|
|Arsenal 2 QPR 1: Sublime Alexis secures the spoils|
|Martinez questions Walters decision|
|Poyet laments Sunderland mistakes|
|League One Review: Swindon cruise to win over Walsall|
|Irvine aware of need for improvement|
|United still doing ´very bad things´ - Van Gaal|
|Lambert proud of players despite Swansea defeat|
|Warnock bemoans Palace defence|
|Bruce hails Hull´s spirit|
|Pochettino relieved to come away with victory|
|Dyche: We had our pocket pinched|
|Monk hails Fabianski performance|
|Pearson demands greater concentration from Leicester|
|Kompany set for City return|
|Rodgers hails character after battling win|
|League Two Review: Ainsworth frustrated by Luton, Shrewsbury go top|
|Everton 0 Stoke City 1: Lacklustre Everton slip to defeat|
|Sunderland 1 Hull City 3: Triumphant return for Bruce|
|Burnley 0 Liverpool 1: Sterling wins it at Turf Moor|
|Leicester City 1 Tottenham 2: Eriksen piles misery on Pearson´s men|
|Manchester United 3 Newcastle United 1: Rooney extends hosts´ streak|
|West Brom 1 Manchester City 3: Three and easy for in-form champions|
|Swansea City 1 Aston Villa 0: Hosts break Boxing Day duck|
|Crystal Palace 1 Southampton 3: Mane marks return with star performance|
|Allardyce upbeat despite defeat|
|Van Dijk happy at Celtic - Deila|
|Table-topping Chelsea delight Mourinho|
|Chelsea 2 West Ham 0: Mourinho´s men ease to victory|
|Suarez enjoying Messi, Neymar link-up|
|A-League Review: Garcia rescues point for Perth, Adelaide up to second|
|Poyet calls for mid-season break|
|Van Gaal rules out Januzaj move|
|Rodgers: Balotelli may have to get used to bench|
|Lallana: I was trying too hard|
|Walker juggles music, football careers in Sweden|
|Song to face ´brother from another mother´ Fabregas|
|Adriano announces Le Havre deal|
|Pardew braced for Old Trafford test|
|Lescott unfazed by City reunion|
|Tskhadadze appointed Georgia coach|
|United to finish top three - Ferdinand|
|Allardyce: Stamford Bridge stalemate saved my job|
|Southampton need three January signings, says Watson|
|Liverpool can make Champions League, says fanzine editor|
|Walsh: Hull clash crucial for Leicester|
|Toure, Aubameyang and Enyeama make shortlist for African gong|
|Docherty backs Chelsea to win two-horse race|
|Liverpool could benefit from Hyypia influence - Scales|
|Saudi Arabia name Asian Cup squad|
|Forty-year-old Cahill no problem for Postecoglou|