Haas F1 team doesn't know how to solve its problems yet

F1's newest squad has struggled to maintain the momentum of its early performances, though it scored again in the last grand prix in Russia following a strong race drive by Grosjean.

The Frenchman complained vehemently about his car's balance on team radio during Spanish GP practice, and went on to qualify 14th.

He declared the car "much better than yesterday" afterwards but said Haas did not have the tools and resources to fix all its issues at present.

"It's quite clear what [balance problems] we are having. We don't know yet how to solve it," Grosjean said.

"We haven't figured it out. The more driving we do and the more understanding we have for the car.

"Next year will be very important for us because we'll have more tools, more sensors on the car, more aero work, more tyre work and just try and get everything correct."

He said overall the combination of reverting to previous set-ups plus the arrival of upgrades to both the car and its Ferrari engine had helped Haas at Barcelona.

"We made some good set-up changes," said Grosjean.

"We reverted back on some philosophies and choices we've made recently.

"We made the upgrade work pretty well."

Grosjean suggested the Spanish GP qualifying result accurately reflected where Haas sits in the pecking order for now.

"On a perfect day we can go close to the top 10, on a more difficult day it's a cut off at Q2," he said.