Ken BlockKen Block and co-driver Alex Gelsomino were taken to a nearby hospital for check-ups after the American crashed heavily during this evening's Rally of Portugal shakedown stage.

Block rolled his Monster Ford World Rally Team Fiesta RS WRC just over a mile into the three-mile stage. The car, which landed on its roof, is well off the road and will not be recovered until later tonight when the shakedown has finished. The crew are not expected to take the start in Lisbon tomorrow.

Block has suffered a tough start to the year, struggling for pace in Sweden before being hit by electrical issues with his Monster energy drink-backed Ford on the second round in Mexico earlier this month.

"Both Ken and Alex have been taken to the hospital in Faro for precautionary checks. All I know is that they rolled, but they're OK," a spokesman from the Monster team said. "We won't know the situation with the car until it is recovered back to service."

Matthew Wilson was following Block in the stage and said: "From what I could see, he had run wide in a corner, clipped the bank on the right and rolled up and over the bank. The car is quite a way off the road and in a field. It was a narrow section, probably third or fourth gear."