Bosnia-Herz (0) v Portugal (1):WINGER SIMAO has promised Portugal will not sit back and look to defend their one-goal advantage in Zenica tonight.

Carlos Queiroz's squad got a hostile reception from the Bosnian fans in Sarajevo. But the visitors know they cannot afford to be distracted as they look to secure their passage to South Africa, and Simao has vowed his team will be on the front foot.

"Tomorrow we will not defend the goal, we will impose our game," said the Atletico Madrid star. "We know the difficulties we had in the last game.

"We tried to control the game after scoring a goal and have more possession, which was not always possible.

"(The game) is the most important because in the last 10 years we have always been in major competitions. A World Cup without Portugal is not the same."

The 30-year-old admits, however, that the quality of the surface which awaits his side in Zenica will take some getting used to.

"The pitch is not in the condition we would like," he said. "We expected it to be better. We're not used to playing on these pitches, but we have to get used to it. The advantage is ours, because we have a one-goal lead."

Deco is doubtful with a muscle strain in his right leg, while Bruno Alves is also a doubt after twisting his ankle on Saturday.

Bosnia showed why only European champions Spain were able to defeat them in the group stage and they could have got an away goal a minute from the end when Edin Dzeko headed against the crossbar before Zlatan Muslimovic hit a post from the rebound.

While the Bosnians will have been enthused by their display, their hopes in the second leg have been undermined by bookings picked up by Emir Spahic, Elver Rahimic and Samir Muratovic which rule them out of the game.