Chinedu Ogbuke and Vedad Ibisevic scored the goals for newly-promoted Hoffenheim, who are now at the top of the Bundesliga after nine matches.
“I was surprised by our performance,” said Rangnick. “The team put forth exactly what we had on the drawing board and we managed to continue on the same vein as the match against Dortmund.
“We played at a high tempo throughout and forced our opponents into mistakes. At the same time we didn’t really give them a sniff.
“Now it’s time to mobilise our strengths and devote all our energy to keeping up the same levels against Bochum.”