The eleventh hour has arrived for the 2015 German grand prix.

Despite a July 19 slot on the calendar, neither the Nurburgring or Hockenheim currently have a deal with Bernie Ecclestone to host the race.

So as the clock counts down to just a week to go until the Melbourne paddock fills, Ecclestone said of a German GP deadline: "Certainly by this weekend.

"(I'm) not sure it's going to happen," the 84-year-old told DPA news agency.