Primeiro de Agosto has a total 24 participations in CAF-sponsored competitions, including 12 in the CAF Champions League, 5 in the African Cup of Champions Clubs, 3 in the CAF Cup Winners' Cup and 2 in both the CAF Confederation Cup and the CAF Cup.
In 1998, the club reached the final of the CAF Cup Winners' Cup, having finished as the runner-up. In 1997 and 2009, they reached the group stage of the CAF Champions League and of the CAF Confederation Cup, respectively.
In 2018, they reached the semi-finals of the champions league, where they were eliminated in a second-leg 4-2 defeat to Espérance Tunis, a match that included an alleged biased officiating performance by referee Janny Sikazwe.[5]
The heavily biased performance of Zambian referee Janny Sikazwe positively prevented D'Agosto from reaching the finals. The renowned referee had a disgraceful performance during the entire match, completely ignoring the rules of the game and clearly siding with the home team. The ice on the cake of his performance occurred shortly before Espérance's final goal, when D'Agosto scored but he inexplicably disallowed the goal on a would-be push to the Tunisian goal-keeper. In the aftermath, Sikazwe was suspended by CAF on suspicion of corruption.[6]
Note: Wilson12' / Dani, Elisio, Kali, Mingo Bile / Amaro, Chileshe, Manucho, Roger, Sangala / Fofaná — Bena 12' D'Agosto flew to Abidjan with only 12 players. At 12 minutes of play, a field player, (the only substitute available) had to replace the goalkeeper who was injured. Furthermore, central back Kali was sent off at nearly half time of playtime.
D'Agosto's coach Ndunguidi deployed three quarter-backs and that strategy paid off when Nsilulu made a superior play for Muanza to score 1-0. Espérance needed to play on the offense and three quarter-backs made D'Agosto's defense look like an insurmountable wall. Stopirrá, Pedro and Nsilulu were at the top of their game to the despair of their opponents. However, the home team managed to score at only 4 minutes of play. Espérance was putting a lot of pressure and close to half time, the referee wrongly awarded a penalty on Julião. Hamrouni took the penalty and scored 2-1. In the second half, D'Agosto was defending too close to the penalty box, Espérance took advantage and Laroussi scored 3-1 after a poor save by D'Agosto's goal-keeper Goliath.
The penalty missed by Assis in the second half at a time when D'Agosto was winning 1-0 might have been enough for D'Agosto to claim the title as they lost 3-1 in Tunis. That miss had a heavy toll on the future career of the young promising player. Assis was the team's official penalty taker. He had successfully scored two against USM so he had earned the trust of coach Ndunguidi Daniel. It was a nerve wracking, intense match. D'Agosto failed to display the superb gameplay they did against Africa Sport. Went for long kicks into the Tunisian penalty box instead of flanking using the speed of either Mendonça or Nsilulu. It was a huge responsibility. In the end, cries of sadness at Cidadela. If only that penalty had been scored...
D'Agosto played a series of matches in preparation for that season's CAF club competitions whereas São Tomé was preparing for the qualification matches for the 2002 FIFA world cup. The matches were also played as a fund raiser for victims of floods in Mozambique.
Note: Ntomas / Arsénio (c), Joaquim, Neto, Russo / Ndisso, Nelito, Valentim / Manuel, Mateus, Vieira Dias – Bila , Bolefo , Kiss , Moisés
On the occasion of the 2nd Congress of the ruling party, the MPLA, Sporting da Praia from Cape Verde was invited to play a series of matches in Angola.
On April 4, 1981, before a 70.000 capacity crowd in Kaduna, Primeiro de Agosto played against then CAN title holders The Green Eagles. In that match that ended in a scoreless draw, D'Agosto put up such a superb performance that the Nigerian supporters and media mistook the club for the Angolan national team.[7]
A four team tournament was organized to mark the 4th anniversary of the club's foundation. In the first match, D'Agosto was kindly awarded victory as the match ended in a draw and a power outage prevented the match to be decided on penalty shootouts.
In June 1980, Primeiro de Agosto's reserve team competed in a four-team tournament in Mozambique with the participation of Desportivo de Maputo and D'Agosto's counterparts (military-sponsored teams) from the home country and Zambia, respectively Matchedje and the Green Buffaloes.
^"1º de Agosto impôs empate (0-0) à Selecção Nacional da Nigéria" [Nigerian National Team concedes (0-0) draw against 1º de Agosto]. Jornal de Angola (in Portuguese). 7 Apr 1981.
