Both teams reached the last 16 after narrow wins on Wednesday and now go head to head for a place in the last 8 in Bloemfontein.
The Germany coach is expecting a tough test from England and is particularly fearful of Rooney who he believes could suddenly burst into form at any time although he has had a bit of a slow start.
He said: “Rooney may not have been a big gun so far but he is always ready to explode, he is difficult to mark and control so our defence will need to watch that he doesn’t score.”