Although few have given South Korea a chance of causing an upset following defeats to Sweden and Mexico, all four teams are still mathematically in contention for a top-two finish. "We have to be masters of our own destiny".
The Swedish team took some solace from its play against Germany and insisted it is ready for its Group F finale against Mexico in Yekaterinburg.
Janne Andersson's side started their World Cup with victory over South Korea and also led at half-time against holders Germany in their second game before Joachim Low's side snatched a last-gasp win.
However, if Sweden and Germany win, the former will need a tiebreaker to go their way.
Mexico are on six points, but could still miss out entirely if they lose to Sweden and Germany win.
The world's most expensive player, who battled back from a broken bone in his foot to be fit for Russian Federation, took plenty of flak despite scoring in the 2-0 victory over Costa Rica on Friday. Winning the group will be important since the finishing second will mean that they will have to play Brazil in the round of 16.
"Mind you, this is not going to be an easy one", Petkovic said.
"Maybe we need one more match and he will be in his full form physically and technically, because he is outside the normal standards".
The Swiss camp is promising no more controversy after Federation Internationale de Football Association fined three players for their "double eagle" hand gestures to represent the Albanian flag in the politically charged victory over Serbia.
"On the pitch it's fine to have emotions, but unsporting behaviour against your opponent is not okay". We are ready to play them and we are looking forward to the challenge. "But, you never know what can happen in the World Cup". He is also feeling the pressure from 22-year-old Brandt, who has only had two brief substitute appearances so far but made an impression and hit the post against Sweden.
A win in Wednesday's tie with South Korea will nearly certainly ensure the Germans' safe passage to the round of 16, though Die Mannschaft will be keeping a nervous eye focused on the events in the Ekaterinburg Arena as a Swedish win against Mexico could potentially have dire consequences for German football.