London: Force India driver Vitantonio Liuzzi will start Sunday`s Canadian Formula One Grand Prix with a different chassis after struggling to score points in recent races.
"The last few races have been pretty tough as we`ve been struggling with a general lack of grip that makes it hard for me to give the maximum," the Italian said in a team preview on Tuesday.
"Monaco was OK and I thought we had solved the issues so it was quite frustrating in Turkey that I couldn`t make the most of our new development items.”
"We`ve put in some long hours at the factory and found some minor damage on the chassis that we picked up in Monaco. We thought we had fixed it but as a precaution we are switching back to the chassis I used in the first four races."
Liuzzi has scored 10 points in seven races, compared to German team mate Adrian Sutil`s 22. The Italian finished out of the points in the last race in Turkey, after ninth place in Monaco.
He also failed to score in the three races before Monaco.