Paul di Resta, Force India, 2010Paul di Resta will sit out Friday running at this weekend's Belgian Grand Prix with his Force India team looking to get its race drivers comfortable with new aerodynamic parts.

With Force India's blown diffuser still needing some work after its first tryout in Hungary, plus wanting to evaluate its low downforce wing designs, the team has decided to give race drivers Vitantonio Liuzzi and Adrian Sutil maximum track time on Friday to help bring it on.

"Unfortunately, I'm not going to be in the car this time out as Spa is a pretty unique track," Di Resta said. "We've also got some work to do on the new blown floor and the low downforce package so it's natural we need to give the race drivers the additional time to properly evaluate.

"I'm happy with this – although it's always hard to sit out on such a great track – as it's a team effort and we've got a big fight on our hands to hold onto sixth in the championship. I'll get my chance in Monza, which I can't wait for."

Although not driving at Spa, di Resta has been working hard in the team's simulator to help prepare the outfit for the Belgian Grand Prix.