Santos joined Etoile du Sahel in 1998, after a two-season spell with Belgian side Standard Liege.
BBC: SPORT | Football | African | Tunisia naturalise Brazilian
Etoile scored two goals in five minutes shortly after half-time to seal the win.
Outsider Mont Etoile, trained by William Haggas, took the Ribblesdale Stakes for part-owner Lester Piggott.
Enyimba defeated Etoile Sahel of Tunisia 5-3 on penalties after the teams finished 3-3 on aggregate.
Etoile beat Ahly in the final of the African Champions League to secure their place at the Fifa showpiece.
"I am very happy with the way the match turned out and very happy with my players, " said Etoile coach Bertrand Marchand.
Enyimba are joined in the final four by Tunisia's Etoile Sahel, who topped Group A despite their 3-2 defeat by Africa Sports in Abidjan.
While Etoile have been happy to stoke the verbal flames, Ahly coach Manuel Jose has been unusually quiet in the build-up to the game.
BBC: SPORT | Football | African | Ahly bid for third straight cup
Midfielder Mohamed Barakat, outstanding in the 2005 demolition of Etoile, returns after being sidelined by a knee injury since the semi-final victory over Ittihad.
BBC: SPORT | Football | African | Ahly bid for third straight cup
Nigerian side Enyimba, the defending champions, are in Group A with Tunisia's Etoile Sahel, Ivorian side Africa Sport and newcomers Bakili Bullets of Malawi.
The result maintained Etoile's unbeaten run in the group and kept the Tunisians on course for the semi-finals for the third time in four years.
He and his band, The Super Etoile, have toured the world for 20 years, picking up elements of the world's musical traditions along the way.
Etoile will now face Argentinian powerhouse Boca Juniors in the semis.
Santos, who plays for French side Sochaux, played two seasons for Etoile du Sahel in Tunisia before moving to France at the start of the 2000 season.
BBC: SPORT | Football | African | Tunisia naturalise Brazilian
Esperance lead the Tunisian championship, with 25 points from 11 games, three points ahead of Etoile (22), and four in front of CS Sfaxien and AS Marsa (both 21).
Etoile goalkeeper Aymen Balbouli frustrated the CONCACAF champions throughout and produced some fine saves to stop Gabriel Caballero's diving header and Marvin Cabrera's fierce shot in the first half.
Meanwhile, Etoile Sahel, led by former national team skipper Zoubeir Beya, and Club Sfaxien, who are inspired by Libyan midfield maestro Tarek El Tayeb, played far more exciting football this season.
BBC: SPORT | Football | African | Esperance rewrite Tunisian football
The Cairo-based side meet hosts Etoile du Sahel in Sousse, knowing that a draw or win would set them up nicely for the return leg in the Egyptian capital on 9 November.
BBC: SPORT | Football | African | Ahly bid for third straight cup
"With his exceptionally exuberant band Super Etoile de Dakar and his musically ground breaking and political solo albums, Youssou Ndour has worked to reduce animosities between his own religion, Islam, and other religions, " it said.
In other first-leg Confederation Cup games played this weekend, ASC Entente of Mauritania beat Etoile Guinea 2-0, Djoliba of Mali earned a 1-0 win over Gambia'a Wallidan, while Tunisia's Stade Tunisien thrashed Senegal's Thies 6-0.
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