Benfica manager Jose Antonio Camacho is expecting "a man's game" when his side take on Celtic in their Champions League clash at Parkhead on Wednesday night.
Benfica are above bottom side Celtic in Group D only by virtue of their 1-0 win over the Parkhead side in Lisbon last month.
Benfica beat Pacos de Ferreira 2-1 in the Portuguese Liga at the weekend to go six points behind leaders Porto but, like Celtic, are on three points in their Champions League section and probably need to win on Wednesday to qualify for the knockout stages of the tournament.
Camacho, a former Real Madrid star, said: "Celtic will be a physically strong team and we have to match them.
"It's going to be a hard game, a man's game. We won't be playing for a draw, we will be playing to win and we will be doing our best to win."
Star striker Nuno Gomes is set to start after playing the last 32 minutes of the win over Pacos after recovering from a thigh injury sustained on international duty with Portugal.