Switzerland coach Ottmar Hitzfeld insists his side will not employ a special gameplan to deal with the high temperature in Manaus during their key match against Honduras on Wednesday.
The game in the Amazonian capital will take place at 16:00 local time, two hours earlier than the three previous matches in the city.
The heat and humidity is profoundly higher earlier in the afternoon, and the Honduran players are well acclimatised to such high temperatures.
But both Hitzfeld and right-back Stephan Lichtsteiner are not overly concerned.
"We are prepared for the Manaus weather conditions, that’s why we came early to Brazil to prepare, we were in Sao Paulo and Salvador," he said.
"We are well prepared. Honduras are a fast team, they have a good attack, they play long passes, are well organised in defence and midfield, they have technical players, and this is why tomorrow we will try to implement our philosophy on the game.
"I'm not going to change my tactics because of the weather but I will not reveal my strategy ahead of tomorrow."
And Lichsteiner, who plays for Serie A champions Juventus, added: @The humidity is different, it's a bit special, in Italy it is not as extreme, but we get the high temperatures. We will adapt, it is a very important match, we had many tips from our staff so we are very well prepared."
A draw could put Switzerland into the last 16 should Group E leaders France beat Ecuador in the other match, but Hitzfeld insists he will go for victory.
"We want to go out and win, we won't play for a draw. That's not our mind-set."
Honduras can also qualify from the group but will need to win by a three-goal margin and hope France also win by a comfortable scoreline.
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