Thrown in the MotoGP deep end, Leon Camier certainly wasn't in need of rescue during Friday practice at Indianapolis.

Called up in place of the injured Nicky Hayden by the Drive M7 Aspar team, Camier faced the challenge of a new bike, team and circuit.

The Englishman finished his first MotoGP session 5.4s from the top, then slashed the gap to 3.5s from world champion Marc Marquez during the afternoon.

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That also put Camier within 1.3s of his team-mate Hiroshi Aoyama and less than half-a-second from PBM's Broc Parkes, meaning he is on course to fight with the regulars in Sunday's grand prix.

"The bike, the engine management system, the tyres... everything has been new for me today and very different to what I am used to riding," confirmed Camier, a WSBK rider since 2010.

"Even so I enjoyed myself, the bike seems good although obviously I have a lot to learn.

"I didn't think I would fit on the bike but it felt much better than I expected. I love the Indianapolis track, in some ways it is similar to Silverstone, and the first corner is really impressive - you have the throw the bike in there and be brave.

"In general I am happy with how the day has gone but I need time to work on the lap time and to find some more speed. I am sure that as I learn the bike I will be able to manage it better in the corners.

"I tried the soft and intermediate compound tyres today and I liked them - they were unlike anything I have ridden on before."