Aprilia on Monday confirmed that MotoGP world champion Jorge Martin suffered multiple rib fractures in a crash on Lap 14 of Sunday's Qatar GP.
The race was the Spaniard's first since he injured his wrist in crashes in pre-season testing, forcing him to miss the opening three weekends of action this year.
"Jorge Martin spent the night at the Hamad General Hospital," Aprilia said.
"There are no traumatic alterations affecting the brain, cervical spine or abdominal organs.
"An update regarding the rib fractures: eight fractures affect the posterior costal arches from the first to the eighth and there are three fractures observed in the lateral arches from the seventh to the ninth.
"Minimal pleural swelling is also noted in the context of the known pneumothorax. Jorge will remain under observation for a few days in Hamad International Hospital until the pneumothorax resolves. We will update you as soon as we will have relevant news." In an Instagram post, Martin expressed relief after the crash, saying "this could have been much worse".
Ducati factory team rider Marc Marquez won Sunday's Grand Prix, claiming his seventh win out of eight races so far this season, sprints included.
Six-time MotoGP world champion Marquez leads the standings with 123 points, 17 more than his brother Alex of Ducati satellite team Gresini.
Marquez's team mate and twice world champion Francesco Bagnaia is third with 97 points after coming second on Sunday.
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