Williams will hope to score points for the third successive F1 race this weekend in Valencia with a series of improvements being introduced again on the FW33.

After a challenging start to the season, Williams has picked up points in the last two races in Monaco and Canada thanks to experienced racer Rubens Barrichello.

With plenty of progress still needed to try and rescue Williams' season, more upgrades will be added to the car in Spain with technical director Sam Michael saying double points were the aim in Valencia.

"Typically the grip level is low at Valencia as it's a street circuit that takes some time to rubber up," he said. "The Pirelli tyres performed exceptionally in Monaco though, so we don't expect anything less here. Set-up is geared for slow speed corner grip, but there is also a fantastic high speed section through Sector Three.

"We have some further upgrades to our diffuser and our target is to be in the points with both our cars."

Barrichello has won in F1 at the Valencia street circuit in the past while team-mate Pastor Maldonado is also a winner at the venue in GP2, with his focus now on breaking into the F1 top ten for the first time.

"I first raced on the Valencia Street Circuit in 2008 in a Dodge Viper Coup? GT3 and finished second," he said. "I entered the European GT race as I wanted to learn the track ahead of the GP2 event that year, which I also went on to finish second in, before winning there in 2010. The track is very similar to Montr?al with long straights, slow corners and walls very close to the track. My favourite part is in the final section, when you brake into the last corner just before the pit entry.

"The weather in that part of Spain is fantastic and I guess the place will be full of Venezuelan fans so that will make it a great weekend for me."