Sauber on Friday was uncertain Sergio Perez will be back in the C30 for next weekend's Canadian grand prix.

The Mexican rookie spent two days in hospital but has now returned home after his big crash during qualifying in Monaco.

On Friday, his Swiss team Sauber explained that - because the 21-year-old was concussed - he will have to "pass the usual medical test with the FIA doctors" before being cleared to race in Montreal.

"I feel very good and fit. Of course I want to race in Montreal, but I also know the final decision is up to the FIA doctors," he said.

Perez revealed he had to call off his scheduled session in the Ferrari simulator this week due to his crash.

"Anyway, it is not the first unknown circuit for me and I have never had difficulties adapting," he said. "I found it very hard to be just a TV spectator for the race in Monaco, and can't wait to get into the car again."

Team technical director James Key sounded confident the FIA doctors will give Perez the green light.

"When I spoke to him he sounded very well and was looking forward to getting back to work. We are looking forward to having him back in the car," he said on Friday.