The massive 4-0 loss against Iran in the last game had shattered Germany's confidence and coach Christian Wuck admitted that his team was under great pressure against Guinea here on Friday.
Germany came close to restoring the lead toward the end of half-time when Elias Abouchabaka's left footed shot from outside the box was saved by Guinea's keeper Mohamed Camara.
"Wuck made five changes to the side that lost 4-0 to Iran on Tuesday, and two of them were later singled out from praise by the coach - Hamburger SV left-back Josha Vagnoman and 6'2" FC Cologne centre-back Yann Bisseck.
Meanwhile German captain Jann-Fiete Arp, the biggest name in the team, said that his players realised that they had to do something very different after the Iran game.
Guinea could only score four goals while conceding eight through the World Cup, with captain Fandje Toure and right-back Ibrahima Soumah sharing the goals equally.
Camacho praised Iran for their attacking football and said, "They played counter attacking football and a very handsome game".
"We have worked out a strategy to overcome the challenge and we are looking forward to win tomorrow", stated Costa Rica coach Breansse Camacho.
Iran and Brazil are through to the last 16 and will determine the fate of Costa Rica and Niger respectively in the Federation Internationale de Football Association U-17 World Cup at the Nehru stadium in Fatorda today.
Iran will definitely miss the services of Mohammad Ghobeishavi for their round of 16 clash as he received the second yellow card in the last three games, that hands him a one-match suspension. We are happy to get to the Round of 16, for the moment.
The problem for Costa Rica is that they are playing against Iran - a team that has surpassed and shocked most in Goa. "This point helped us a lot", said Abbas.
Summary: That boils down to beating Costa Rica to guarantee topping the group."Goa is a good omen for us", the stoic Chamanian said.
Asked about the conditions in Kochi, he said, "I think conditions in Kochi are better than Goa because it is not so hot and not so humid".
He had a very, very good game and the other, Yann Bisseck, a great defender, made no mistakes, or probably he made one. However coach Souleymane Camara feels the experience will bear fruit in six years' time, when the Africans will host the African Cup of Nations (AFCON) for the first time. My players played better here, and it is something I can't explain. First of all we have to sleep.