Ibrahima Sory Keita and Haithem Jouini scored twice each as hosts Senegal and Tunisia made winning starts on Saturday in the African 2016 Olympic Games football qualifying tournament.
Keita struck twice within six first-half minutes to help Senegal overcome South Africa 3-1 in the opening match of Group A and the 15-day competition at Stade Leopold Sedar Senghor in Dakar.
The second game of a double-header at the 60 000-seat national stadium was closer with Jouini completing his brace six minutes from time to earn Tunisia a 2-1 win over Zambia.
South Africa were the more impressive side before falling behind when Keita converted a 16th-minute penalty after flying winger Ismaila Sarr was pushed off the ball, reports AFP.
When the visitors conceded possession cheaply in midfield soon after, Samba Ndiaye set up Keita to score again with a close-range flick past goalkeeper Ricardo Goss.
Rattled South Africa recovered to halve the deficit on 28 minutes through another penalty, which Siphelele Ntshangase slammed past Senegal skipper Pape Ndiaye.
South Africa had more possession for much of the second half in 30-degree Celsius heat only to be let down by a lack of attacking creativity.
Giant striker Jouini headed Tunisia in front on four minutes off a corner only for Ronald Kampamba to level after 16 minutes with an audacious long-range shot over poorly-positioned Sabri Ben Hassen.
Tunisia created the better second-half chances and deservedly regained the lead when Jouini nodded a Saad Bguir cross past goalkeeper and captain Toaster Nsabata at the far post.
Group B kicks off Sunday with Algeria playing Egypt at Stade Caroline Faye in M’Bour, 70 kilometres south of Dakar, followed by Mali against Nigeria at the same venue.
The top two countries in each mini-league advance to the semifinals and those finishing first, second and third qualify for the Rio Olympics.
