Tunisia's Etoile Sahel opened their Champions League group campaign with a vital 1-0 win at Olympique Chlef of Algeria. Midfielder Aymen Belaid scored the only goal of the game with a header in the seventh minute. Etoile lead Group A as local rivals Esperance take on Sunshine Stars of Nigeria on Sunday. In Group B, Zamalek lost 3-2 to Berekum Chelsea of Ghana while Ahli and Mazembe clash on Sunday.