Already a World Cup heavyweight, a young German squad has displayed a lethal knockout punch in South Africa, flooring Australia 4-0 in their opener but will wary of a Serbian team fighting for survival following a 1-0 loss to Ghana.
"We have to be ready for an intense fight," warned Low. "Serbia is like a boxer who has taken a first blow they will be poised to hit back.
"They basically have to win the next match so they will be poised to attack. Since they lost their first match they are even more dangerous in the second match so we have respect for the Serbs."
As fights go, Friday's contest would appear a mismatch, with the three-times champions taking on a Serbia side stepping into the World Cup ring for the first time.
"If you know the Serbia culture they are very strong fighters, they are perfectly able to deliver on their promises," cautioned Low.
"They will be strong technically; they will have a strong fighting spirit and they will go the extra-mile until the very last minute.
"They have many strong individual players. If you take a look at the clubs these players play for, these are top clubs in Europe and you can see at first glance how dangerous this team is."
After days of being whipped by icy winds and pounded by rain, the warmth returned to the "Friendly City" as Port Elizabeth rolled out a sunny welcome mat.
"We didn't have a chance to practice because the last training was cancelled," said Low. "But irrespective of pitch condition we have to be ready for a fight."
