After his painful race in Baku, Formula 1 record world champion Lewis Hamilton has cautiously given the all-clear.

“Back is a bit sore and bruised but nothing serious thankfully,” the Mercedes driver wrote on Instagram on Monday. He had slept badly the night after the Azerbaijan Grand Prix and had been treated with physiotherapy and acupuncture, the 37-year-old added. But Hamilton ruled out giving up a start in Canada next Sunday: “I’ll be there this weekend, wouldn’t miss it for the world.”

Earlier, Mercedes team boss Toto Wolff had said it was “definitely” possible the record-breaking champion could take a compulsory break in Montreal. Caused by his badly hobbled Mercedes, Hamilton not only has muscular problems from the constant knocks he is currently subjected to in the cockpit, he said. “It really goes deep on the spine and that has consequences,” Wolff explained.

TV pictures showed Hamilton shortly after the end of the race in Baku apparently struggling to get out of his car. “It looks bad and feels 100 times worse,” the Briton posted on Instagram on Monday night.

The technical problem arises from the cars being heavily modified for this season. At high speed, the cars are pressed to the ground on the straights until they briefly touch the asphalt and are thus pushed up again. The drivers are shaken violently again and again.