Portugal are desperate to qualify the World Cup in Brazil but are second in the group, one point behind leaders Russia and five above second-placed Israel who they host next Friday.
"Cedric and Almeida are two players that arrive here having proven themselves in the Under-21 national squad," Bento said.
"Cedric has played more regularly at Sporting while Almeida has been part of a rotation strategy at Benfica but is also more versatile as we can play him in midfield."
Bento named a larger than usual 25-man squad because Real Madrid's Fabio Coentrao and Valencia's Helder Postiga are suspended for the first match. Portugal host Luxembourg on Oct. 15.
Goalkeepers: Anthony Lopes (Lyon), Beto (Sevilla), Rui Patricio (Sporting).
Defenders: Cedric (Sporting), Andre Almeida (Benfica), Ricardo Costa (Valencia), Bruno Alves (Fenerbahce), Luis Neto (Zenit St Petersburg), Antunes (Malaga), Pepe (Real Madrid), Fabio Coentrao (Real Madrid).
Midfielders: Raul Meireles (Fenerbahce), Joao Moutinho (Monaco), Miguel Veloso (Dynamo Kiev), Ruben Micael (Braga), Andre Martins (Sporting), Josue (FC Porto).
Forwards: Nani (Manchester United), Cristiano Ronaldo (Real Madrid), Helder Postiga (Valencia), Hugo Almeida (Besiktas), Eder (Braga), Nelson Oliveira (Stade Rennes), Varela (FC Porto), Danny (Zenit St Petersburg).
- Sports & Recreation
- Real Madrid
- Fabio Coentrao
- Hugo Almeida