"We came to Russian Federation with a lot of criticism but we're working hard and have a lot of talent".
The goal, five minutes into second-half added time, and only moments before the final whistle, gives Germany a strong shot of advancing to the round of 16 on a night that began with the team facing elimination.
"Sebastian has had an operation and we are considering whether he will wear a mask, but we are assuming he won't play", said Germany assistant coach Marcus Sorg on Monday.
The spectre of the champions' curse has been hanging over the Germans, who were in serious danger on Saturday of following France (2002), Italy (2010) and Spain four years ago in becoming the fourth holders this century to be humbled in the group stage.
Werner, 22, admitted the Germans have seen little of South Korea, other than their defeats to group rivals Mexico and Sweden, but will do their homework.
"I was very pleased for him (Kroos) because he was involved in the mistake which led to Sweden's goal. That was a setback but we had to digest that first but we knew we could claw our way back".
"I'm not going to cast any blame - I haven't watched the situation myself - I can only refer you to the people on our team who have said this is a clear penalty", he said.
Germany coach Joachim Low and Toni Kroos celebrate after the match against Sweden.
There will be even more changes against South Korea.
In Russia, El Tri has beaten defending World Cup champion Germany, 1-0, and South Korea, 2-1.
Defender Mats Hummels hopes to return from a neck injury, most likely replacing club team-mate Jerome Boateng who was sent off against Sweden.
The Swedish Football Association said on Sunday it had filed a police complaint in the wake of a spate of threats and racial slurs targeting Durmaz.
"It will be a very hard game and there will be a lot of counter-attacks from South Korea... they also have a tight defence".