CAIRO, Egypt -- Defending champion Tunisia defeated Zambia 4-1 Sunday in the African Cup of Nations behind three goals from Silva dos Santos.
Dos Santos, a Brazilian-born midfielder who plays for Toulouse in France, had the second hat trick in the tournament in two days. Samuel Eto'o scored three goals in Cameroon's victory over Angola on Saturday.
"We didn't deserve to be beaten like that," Zambia coach Kalusha Bwalya said. "We played well in the first half, but they were dangerous on the break. We give them credit for taking advantage of their chances."
Tunisia is the only African team returning to the World Cup this year from four years ago, and Roger Lemerre is the only coach to be back with his team at the African championship two years later.
"We managed to recover," Lemerre said. "We have good strikers who showed they had the quality to overturn the result."
In Alexandria, Guinea got late goals from substitutes Sambegou Bangoura and Ousmane Bangoura in a 2-0 victory over South Africa, which is trying to rebuild for the 2010 World Cup at home after missing out on this year's tournament.
Tunisia and Guinea lead their group with three points after the first round of games.
Togo, which has qualified for the World Cup, is in turmoil one day after losing 2-0 to Congo. Striker Emmanuel Adebayor threatened to leave the tournament in a dispute with coach Stephen Keshi. Adebayor has accused Keshi of trying to pressure him into becoming his agent.
"I told him no, I don't work that way," Adebayor said. "Then later (in the day) he said he wanted me to play but I refused. I am going home. I want to see my mother in Lome who is ill."
Keshi said: "Don't believe him. He thinks he's a superstar. He is trying to finish me."