Paul di Resta insists that Force India must work to regroup over the summer break on the back of a disappointing weekend in Hungary.

For the second successive race, the Sahara-backed team failed to score after the Scot and team-mate Adrian Sutil were both sidelined by hydraulics problems.

It capped a disappointing end to the first half a season that had promised much for the Silverstone-based team and while it stays ahead of McLaren in the standings, its advantage has been cut down to two points.

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Speaking to the Press Association, di Resta admitted that Force India now need to regroup during the summer break to come back stronger at Spa.

"It's at the end of the race where you need to be scoring points, but that race didn't allow us in any way to fight the people we should have been," he said of the Hungarian event. "We need to get some rest. But equally we need to get ourselves together because over the last few weekends we've missed some opportunities and other people have overtaken us.

"We've some work to do, but I've faith in the team everyone will be working hard when we return because when this unit works together you can see it rewards us in great ways.

"We need to get the car working in the zone it works in. In Hungary it was very much on edge, difficult to drive. You get weekends like that. Maybe the tracks haven't suited us, but we can't really single that out.

"We have to regroup, analyse properly and get to the next grand prix when hopefully it will be a fresh start like at the beginning of the year when we seemed to be punching way above our weight."

Di Resta added that it was important for the team to make sure that the hard work that has gone into the season already isn't allowed to go to waste.

"I don't want to let this championship slip away," he said. "We started off excellently, and there is no reason why we can't recapture that form."