Madagascar took a big step towards securing a place in the second round of 2018 FIFA World Cup qualification with a 3-0 triumph over Central African Republic.
Central African Republic missed out on the chance to play the first leg at home due to violence in Bangui, so both fixtures were instead scheduled to play in the Madagascan capital of Antananarivo.
And the side from the Indian Ocean island took the lead after just 27 minutes with a goal from Michael Rabeson.
Njiva Rakotoharimalala added a second six minutes before the interval and captain Johann Paul rounded off the victory in the 65th minute, leaving Central African Republic with a huge task to overturn the deficit with Senegal awaiting the winner of the tie in the next round.
Eritrea fell to a 2-0 defeat at home to Botswana, coached by former West Ham United defender Peter Butler.
Galabgwe Moyana put the visitor ahead in the 22nd minute and the advantage was taken into the interval.
The midfielder was withdrawn after 59 minutes but Botswana soon made sure of the win through Joel Mogorosi in the 64th minute.
Finally, Sierra Leone failed to follow up a draw with 2015 Africa Cup of Nations winner Cote d'Ivoire in September with another positive result as it suffered a 1-0 loss against Chad.
Leger Djimrangar scored the only goal in N'Djamena after a goalless first half, inflicting coach Sellas Tetteh's first defeat as coach of the west-African side.
Sierra Leone will host the return leg in Nigerian city of Port Harcout as it remains banned from home fixtures due to the Ebola outbreak.