The two Virgin cars sat on the back row of the grid, with only Hispania - who failed to qualify - slower.

Glock admits that Virgin were a tad lucky to have found themselves within the 107% cut off for race qualification.

"Definitely. At one point we were 105 [per cent] off, I think, so we had a bit of a margin. But if the other guys put soft tyres on and really go for it in Q1, we will be massively in trouble," explained the German.

"The balance of the car is not that bad. Simply, we just have not enough downforce, and the people in the team have to realise that."

Glock readily admits that the team have improved from last season in some areas, but many key elements are still lacking.

"We went forward in terms of the whole structure of the team", said the 29-year-old.

"The work from the mechanics and engineering side much better than last year. But performance wise, in my opinion, we moved backwards.

"The others just made massive steps. We are just not able to make these big steps. We didn't believe it in Barcelona [testing] but now it's quite obvious that we are not where we should be. The team has to think about certain things and make changes to get us closer. We cannot continue like this. It's not possible."

While Virgin technical director Nick Wirth is an avid fan of the Computational Fluid Dynamics system that the outfit makes use of instead a wind tunnel, it appears Glock is less than convinced, replaying that it 'could be' the reason for their problems.

"We have to think about these things now," he added.

"Other teams are using CFD but mixed with the wind tunnel, so we have to come to the point and rethink about this."

Source: Planet F1