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."
A World Cup qualifier between South Africa and Senegal will be replayed after the match referee was banned for life by Fifa.
Ghanaian referee Joseph Lamptey was banned for "match manipulation".
He awarded a penalty to South Africa in their 2-1 win in November last year for handball but replays showed the ball hit Senegal's Napoli defender Kalidou Koulibaly on the knee.
The match is due to be replayed in the November 2017 international window.
Lamptey was initially banned for life in March but on Wednesday the decision was upheld by the Court of Arbitration for Sport.
Lamptey, who also officiated at the Rio Olympics last year, declined BBC Sport's invitation to comment at the time of his original ban, which came about after a complaint from the Senegal Football Federation.
Senegal and South Africa are currently third and fourth respectively in Africa's Group D behind Burkina Faso and Cape Verde Islands. Only the top team qualify for next year's finals in Russia.
Top of Form
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.
Iran became the second team to qualify for the 2018 World Cup as they beat Uzbekistan 2-0 in Tehran.
Goals from Sardar Azmoun and Mehdi Taremi ensured Iran, coached by Carlos Queiroz, will appear at successive World Cups for the first time.
Victory meant they opened an eight-point advantage over their opponents, who are third in the table.
Five-time winners Brazil were the first team to join hosts Russia at next year's tournament.
The top two teams in each of Asia's two qualifying groups progress to the World Cup, while the teams in third place go into a series of play-offs.