Barrichello believes reaching Q3 in Hungary will be difficult

The Williams driver finished down in 13th position in today's practice, and Barrichello admitted his car had improved since the last race.

He said, however, that Williams was still not where it wants to be, and reckons making it to Q3 will be hard.

"We tested a lot of things today," said the Brazilian. "We had to run without KERS in the morning session because of a small problem but we reinstated it for the afternoon and it was fine. The car has improved a little bit, but P13 isn't where we want to be and it's going to be tough to break into Q3 tomorrow.

"Our goal today was to focus on set-up for the race as I think points are achievable here."

Team-mate Pastor Maldonado was 15th fastest after spending the day trying new parts for his car.

"We brought new parts to Hungary which we spent today testing," said Maldonado. "I was trying out a new cooling system and I have an updated rear wing coming tomorrow that was working well on the other car. I'll be working hard tonight with my engineers to improve the car. We've got plenty to do in order to have a good race."