Emeka Opara opened the scoring for Etoile Sahel against Zamalek

Etoile's victory means that they will play either reigning champions Enyimba of Nigeria or Morocco's Raja Casablanca in the semi-finals while Zamalek face their compatriots Ahly, who have already won Group A.

The first half was goalless with the two best chances falling to Etoile, as Hakim El Barqee's acrobatic double-kick went wide and Gerson Silva's powerful shot was saved by Zamalek goalkeeper Abdel Wahed El Sayed.

Zamalek's best effort came as Adel Fathy's powerful shot was dropped by Etoile's goalkeeper, who managed to gather the ball just as Junior was about to follow up.

Final Group B standings Etoile 10 pts Zamalek 9 Asec 6 Esperance 4

Etoile took the lead six minutes into the second half through Nigerian striker Emeka Opara, who converted a cross from the side by Silva.

The lead was doubled six minutes later as Etoile were awarded a free-kick just outside the area and Marouane al-Bokri's superb shot flew past El Sayed.

Zamalek managed to get back into the game and were rewarded in the 64th minute with a consolation goal from Adel Fathy.

Etoile played the final four minutes of the game with 10 men as one of their players was sent but they held on for the victory.

Meanwhile in the other match in the group in the Ivory Coast capital Abidjan Asec Mimosas edged past Esperance of Tunisia 1-0.

A late goal by striker Abdramane Diaby handed Asec the narrowest of wins.

Diaby's strike was fit to win almost any game, a rocket of a shot from outside the area that the Esperance keeper got a hand to but couldn't keep out of the roof of the net.

Asec deserved their win, having dominated from start to finish.