South Africa may appeal against Fifa's decision to order a replay of the World Cup qualifier against Senegal because of "match manipulation" by the referee.
South Africa beat Senegal 2-1 at home last November but match referee Joseph Lamptey has since been banned for life.
Neither South Africa nor Senegal are accused of any wrongdoing.
"We're grappling for answers and asking Fifa for them before we decide whether to take the matter forward," said South African FA lawyer Norman Arendse.
Arendse, who chairs the legal committee of the South African Football Association (Safa), says his organisation has never been advised by football's world governing body how the match was fixed.
"Safa cannot accept (the game was manipulated) because we have got absolutely no details of the alleged manipulation, what the nature of it was and what it all involved," he told BBC World Service's Newsday programme.
"Is (the referee) just a corrupt individual? Was he bribed by a third party outside of the match to influence the outcome? We just don't know.
"That is the most unpalatable thing for us - to accept an outcome to which we should have been party. We've never ever been called upon to put our side of the story in relation to the game."
Egypt gained revenge for Friday's defeat in Kampala by beating Uganda 1-0 in Alexandria to leapfrog their opponents at the top of Group E.
Mohamed Salah scored the winner after six minutes, netting at the second attempt after Uganda goalkeeper Dennis Onyango blocked his first effort.
Onyango's saves kept Uganda in the tie.
There were huge celebrations at the end among Egyptians, who have not been to the World Cup since 1990 despite winning four African titles since.
The North Africans now have nine points, Uganda seven, while Ghana - who have appeared at the last three World Cups - lie in third with five points after thumping Congo 5-1 in Brazzaville.
Congo, with just one point, can no longer qualify for next year's tournament in Russia.
Atletico Madrid midfielder Thomas Partey hit a hat-trick to inspire Ghana to their first win in the group - at the fourth time of asking - which came four days after being held to a 1-1 draw at home by the same opponents.
Partey, 24, scored his first international goal in that game.
Richmond Boakye grabbed a brace while Ukraine-born Vladis Illoy Ayyet scored a consolation for Congo.
Congo had started the game in Brazzaville strongly but were overpowered after Ghana opened the scoring against the run of play after 23 minutes through Boakye, with Partey doubling that lead just three minutes later.
In a topsy-turvy spell just before half-time, Illoy Ayyet scored his first goal for Congo after 43 minutes only for Partey to spin cleverly and fire home Christian Atsu's pass from a tight angle in first-half stoppage time.
With 21 minutes left on the clock, Partey resembled a seasoned striker as he lashed into the top corner after 69 minutes to seal his hat-trick.
Top of Form
African champions Cameroon cannot qualify for the 2018 World Cup finals in Russia after a 1-1 draw with Nigeria in Yaounde on Monday.
The result means Cameroon have just three points from four matches and can no longer finish top of Group B.
"There's no-one in life who achieves all his goals [but] it's a disappointment," Indomitable Lions coach Hugo Broos said after the game.
In Monday's other match, Libya earned a 1-0 win over Guinea in Group A.
Nigeria took the lead in Yaounde after 30 minutes through Moses Simon but their hosts equalised with 15 minutes to go through a Vincent Aboubakar penalty.
The Super Eagles' goal came after Cameroon failed to clear and Simon profited after touches from Odion Ighalo and Victor Moses.
On the hour, Cameroon coach Hugo Broos made two changes as Vincent Aboubakar and Christian Bassagog came on to replace Benjamin Moukandjo and Jean-Pierre Nsame.
The changes had the desired affect as the Indomitable Lions pushed forward and forced Nigeria's third choice keeper Ikechukwu Ezenwa into a foul in the area.
Aboubakar stepped up to score the penalty in the 75th minute firing the ball straight down the middle.
But Ezenwa made amends for the penalty error with two saves in quick succession to deny first Nicolas Moumi and moments later Collins Fai.
The other match in Group B sees Algeria host Zambia in Constantine later on Tuesday.
A win for Zambia will take them to seven points, just three behind Nigeria with two games to play - while Algeria must win to keep alive any slim hopes they still have of going to Russia.
In Monastir, Libya got their first points of this stage of the campaign despite being down to 10 men for the last quarter of their match against Guinea.
Hamdou Mohamed scored the only goal of the game towards the end of the first half.
Should Tunisia get a point against DR Congo on Tuesday, then both Libya and Guinea will be formally ruled out of contention for Russia 2018.
US President Donald Trump's eldest son, his son-in-law and his former campaign manager are to testify before Senate committees investigating alleged Russian meddling in the 2016 election.
Donald Trump Jr, Jared Kushner and Paul Manafort are suspected of having links with Russian officials.
Mr Trump and his allies have denied any collusion.
Meanwhile, Mr Trump said he would not have named Jeff Sessions had he known he would recuse himself from the probe.
In an interview with the New York Times, Mr Trump called the attorney general's decision "very unfair".
"Sessions should have never recused himself, and if he was going to recuse himself, he should have told me before he took the job and I would have picked somebody else," Mr Trump said.
Mr Sessions rescued himself from overseeing the Russia investigation in March, after failing to disclose at his confirmation hearing at the Senate that he had met Russia's ambassador to the US.
Mr Sessions has not commented on Mr Trump's latest remarks.
In the same interview, Mr Trump also said that his conversation with Russian President Vladimir Putin at a dinner during the G20 summit in Germany this month lasted for 15 minutes and it was mostly about "pleasantries".
He also said they talked "about adoption", the New York Times reported. Russia banned Americans from adopting Russian orphans as a reaction to Us measures against Russian officials accused of human rights violations.
The second meeting between Mr Trump and Mr Putin was only confirmed by the White House after media reports revealed it.
Several congressional panels and federal investigators are looking into claims that Russia interfered in the election in a bid to help Donald Trump.
The meeting in New York is the firmest evidence yet of non-diplomatic interactions between Trump campaign aides and Russian figures.
US President Donald Trump met Russian counterpart, Vladimir Putin at a second, previously undisclosed meeting at this month's G20, it has emerged.
They held talks after a formal sit down but the White House has not revealed details of what they discussed.
President Trump dismissed suggestions of a "secret dinner" as "fake news".
The two leaders' relationship is under intense scrutiny amid allegations of collusion between Russia and the Trump campaign.
US intelligence believe Russia helped Mr Trump in last year's presidential election, something denied by Russia. Mr Trump has rejected any collusion.
The second meeting happened during a private meal of heads of state at the G20 summit in Hamburg earlier in the month.
The US president was alone, and Mr Putin was attended only by his official interpreter, with US media saying it lasted an hour.
The only version of what was discussed was provided to White House officials by Mr Trump himself, as there were no other US aides present at the conversation.
The White House confirmation came after media reports revealed the encounter. An official described the interaction as a "brief conversation", not a "second meeting".
A Russian translator was used, the official added, because the US translator at the dinner did not speak Russian.
The talks were first reported by Ian Bremmer, president of the US-based Eurasia Group, in a newsletter to clients. He described that both talked "privately and animatedly" and that the lack of a US translator had raised eyebrows at the dinner.
The White House official added that the "insinuation" that the government had "tried to 'hide' a second meeting is false, malicious and absurd".
Mr Trump later said on Twitter: "Fake News story of secret dinner with Putin is 'sick.' All G20 leaders, and spouses, were invited by the Chancellor of Germany. Press knew!"
At the formal meeting, their first face-to-face encounter, Mr Trump said he repeatedly pressed Mr Putin about the allegations of interference in the US vote.
"I said, 'Did you do it?' He said, 'No, I did not, absolutely not.' I then asked him a second time, in a totally different way. He said, 'Absolutely not.
Meanwhile, the White House said Mr Trump would nominate former Utah governor Jon Huntsman as ambassador to Russia, a key post for a president who promised to improve relations with Moscow.
Mr Huntsman, who served as ambassador to China and Singapore, needs to have his name confirmed by the Senate.
The suspicions over Russian interference in the election are likely to play a significant factor in his confirmation process, correspondents say.