Former world champion Ott Tanak escaped serious injury when he crashed his Hyundai at the Rally of Finland on Friday.
Co-driver Martin Jarveoja, however, was taken to hospital for tests although Hyundai said it was a precautionary measure.
Hyundai said Tanak's car "slid off the road at high speed in tricky and slippery conditions" on the third special stage, going on to roll and hit a tree.
"After the accident, Tanak and Jarveoja exited the car themselves without assistance and the stage was immediately red flagged to allow medical services to attend the scene.
"Both Tanak and Jarveoja were quickly attended to by the medical team, with Jarveoja taken to hospital by helicopter for further examination.
"While both driver and co-driver are well, Järveoja will need to remain in hospital overnight for observation as a precaution."
Prior to the start of the rally, the ninth event of the WRC season, Tanak was second in the overall standings, just eight points behind his Hyundai teammate Thierry Neuville.
After six stages, three Toyotas were leading the rally, with two-time reigning Finnish world champion Kalle Rovanperä ahead of Britain's Elfyn Evans and third-placed Frenchman Sebastien Ogier.
Neuville was fourth, more than 24 seconds behind the race leader.