Marussia team principal John Booth says the uncertainty over Max Chilton's drive at the Belgian Grand Prix won't harm his chances of staying with the team.

Chilton was originally dropped due to "contractual issues", with reserve driver Alexander Rossi being promoted and appearing in FP1. However, during the opening practice session it was confirmed that Chilton was being reinstated, with the Briton saying that the issue "was not what everyone seems to think has gone on" in reference to rumours he had found money to regain his seat.

Speaking exclusively to Crash.net, Booth has since confirmed that Chilton's chances of staying with Marussia beyond the end of this season have not been harmed by the incident, and praised both Chilton and Rossi for their conduct.

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"They were both very professional," Booth said. "It amazes me for young drivers how professional they are. They absolutely took it in their stride.

"[Chilton] didn't get much dry running and then straight in to the wet on Saturday. So he missed one full session of dry running and there was only two sessions so he was on the back foot but he did a good job."

Chilton was the only Marussia to finish in Belgium but Booth added that the earlier weekend issues perhaps overshadowed the performance of Jules Bianchi who showed just how much progress the team made with chassis and suspension ugrades at Spa.

"Performance-wise the car was a good step forward, we're really pleased. Jules' race was over when he was 50 seconds behind without a safety car, so I think the pace he showed in matching the Saubers was very encouraging."