Andrew Jordan has been taken to hospital after a heavy first lap crash during the opening British Touring Car Championship race at Donington Park.
Having started 16th, Jordan passed the Mercedes A-Class of Aiden Moffat and the Ford Focus of Ollie Jackson on the approach to the Old Hairpin.
But Power Maxed Racing driver Rob Collard dived up Jordan's inside in his Vauxhall Astra at the apex. The pair collided and knocked Jordan's rear end.
As Jordan tried to correct the subsequent slide he span across the track, where he took a heavy hit on the driver's door from an unsighted Adam Morgan.
Ex-BTCC racer and Jordan's father Mike said: "[Andrew's] a bit rough actually, I'm going to the hospital with him.
"He's got a lot pins and needles in his head - he's taken a big hit."
Jordan also received a second impact when Team Parker Racing driver Stephen Jelley tagged into the side of his BMW 330i M Sport.
Mike Jordan blamed Collard for the collision, adding: "If you qualify down there then you're in pack with all the idiots."
WSR tweeted to say that, irrespective of Jordan's assessment, he will be unable to continue in the meeting.
"Unfortunately, it's game over for Andrew Jordan today, as his BMW 330i M Sport sustained too much damage in the open race at Donington Park to be repaired at the track.
"AJ has a sore side and is having a medical precautionary check."
Morgan reckons his Ciceley Motorsport team will be able to repair the A-Class for races two and three providing there is no chassis damage, as the outfit has a spare front end.