LAGOS (AFP) Holders TP Mazembe and six-time winners Al Ahly will be looking to overturn losses to minnows APR and Gunners respectively this weekend in return leg matches of the CAF Champions League. Mazembe were upset 1-0 by army team APR of Rwanda in Kigali, while Ahly fell by the same scoreline to Zimbabwean debutants Gunners a fortnight ago. APR are one of the experienced campaigners in Africas premier club competition and also provide the core of the Rwandan national team. However their ambitious bid to reach the money-spinning group stages of the Champions League for the first time this year has been boosted by the arrival of several new players. Dutch coach Eric Paske is hopeful his team plays with the right attitude at Lubumbashi, and sends the defending champions packing from the competition in the second round. We need to be at our very best because Mazembe have vast experience in the competition and with stars like Tresor Mputu, Guy Lusadisu, Alain Kaluyituka Dioko and Given Singuluma, we need to be alert and try to play with the right attitude. In Egypt, Ahly will be favourites to beat Gunners, a side promoted to the Zimbabwean top flight only two years ago, and advance to the third round of the championship after they lost the first leg in Harare. Last year, the 'Red Devils were eliminated by another debutant, Kano Pillars of Nigeria, in the third round of the competition. The fact that we beat them is a motivational factor in itself and the players are fired up. They know if they play well they get noticed in Africa, said Gunners coach Wellington Mpandare. Former African champions ASEC Mimosas of Ivory Coast also have to overturn Zambian champions Zanacos 1-0 lead from the first leg in front of their fans on Sunday at the Felix Houphouet-Boigny Stadium in Abidjan. In the southeastern town of Owerri, last years beaten finalists, Heartland FC, will host Cameroonian champions Tiko United after both teams played out a 2-2 in Douala two weeks ago. Tiko United have already made a major change to their team since the draw at home with the appointment of the countrys youth team coach, Alain Wabo, in place of Gerard Mbimi, who has been elevated to the position of technical director. Wabo aka 'Capello led Cameroon to the final of the African Youth Championship in Rwanda last year and was even linked to the top coaching job of the Indomitable Lions following the exit of German coach Otto Pfister. Heartland have struggled this term in the domestic league as a result of cash problems, but showed they cannot be written off just yet when they recorded a confidence-boosting victory over title-chasing Kano Pillars in a rescheduled league fixture earlier this week. Emeka Nwana and Bello Kofarmata, who scored against Pillars, will be expected to carry the team in this years continental campaign following the departure of the prolific Uche Agba to Club Sfaxien of Tunisia.