The head of the African Union Commission Moussa Faki Mahamat voiced concern on Saturday about the political crisis in Senegal but said he hoped "free and transparent" elections would be held there soon.
"The situation in Senegal, a model country in terms of democracy, worries us to a great degree," Faki said.
But he said he welcomed the government decision to follow the Constitutional Council's ruling.
Faki said he hoped there would be a "spirit of consensus" to organise "inclusive, free and transparent elections" as quickly as possible.
Sall's last-minute move to postpone the February 25 poll until December triggered Senegal's worst crisis in decades. Sall, who has been in power in the west African country since 2012, said he called off the elections over disputes about the disqualification of potential candidates and concern about a return to unrest seen in 2021 and 2023.