Pastor Maldonado admitted that Williams have a mountain to climb after slithering out of Q1 ahead of the Australian Grand Prix.
In wet conditions Maldonado managed only the eighteenth fastest time while team-mate Valtteri Bottas was only two places higher.
"I think we're back to the condition of two years ago in the team," he toldSky Sports F1.
"We need to work very hard to solve the problems. The car is undriveable at the moment and we need to work. That's it."
Nevertheless the Venezuelan is optimistic that the FW35's race pace shows more promise.
"For whatever reason, we didn't adapt our car to this track, whatever the conditions. In the wet we were slow, in the dry as well. The pace for tomorrow seems to be much better but qualifying pace is really bad," Maldonado concluded.