The Constitutional Court of the Democratic Republic of Congo is due to begin hearing a challenge into last month’s presidential election.
The petition to annul the presidential results was submitted last week by Théodore Ngoy, who came last with 0.02% of the vote.
He termed the results a “sham”.
The two main opposition candidates, Moïse Katumbi and Martin Fayulu, disputed the results but declined to challenge them in court.
The Constitutional Court is expected to give a ruling before 12 January, when the electoral body will announce the final results.
If Mr Ngoy’s challenge is thrown out, President Felix Tshisekedi will be sworn in for a second term on 20 January, after winning the election with 73% of the vote.
The 20 December election was marred by widespread logistical problems. It had to be extended to a second day in some parts of the vast country.
On Sunday, the electoral body disqualified 82 legislative, provincial and local candidates, citing fraud and violence.