Further details have emerged regarding Saturday's finger injury for reigning MotoGP champion Marc Marquez.

Dr Xavier Mir, who performed surgery on the Repsol Honda star, has revealed Marquez's hand was run over during the dirt track training accident.

"Marc crashed on Saturday while he was practicing dirt track. Unfortunately the rider just behind him hit his hand," Dr Mir told MotoGP.com. "This caused a severe displacement of the fifth [little] finger of the left hand.

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"It [the displacement] was so bad that he thought it was dislocated - as the finger was out of its place. He tried to put it back into place by pulling on it, but as he heard some noise he figured out it was better not to touch it! And that's when he came to the hospital."

Dr Mir inserted a titanium plate to stabilise the fracture and believes Marquez will be able to take part in this weekend's fourth round of the championship at Jerez.

"Treatment during the next few days before Jerez should reduce inflammation, so he can race there," Dr Mir declared.

The doctor added that the latest gearshifting technology, which removes the need to use the clutch lever, means Marquez is in a better position than would have been the case several years ago.

"It's a shame he got hurt but he was lucky it's the left hand - in MotoGP the clutch lever is not used that much," Dr Mir said. "It's mainly used for the start of the race, so this kind of helps us so there's less stress on the injury.

"I can't say he will be 100% fit, but we always see riders push their limits so I'm sure he will be able to do well!"

Marquez is 30 points behind title leader Valentino Rossi after falling while the pair battled for victory last time out in Argentina.

Team-mate Dani Pedrosa, sidelined since Qatar due to arm pump surgery, is also tipped to ride this weekend. Pedrosa will take part in a supermoto race this week before making a final decision.