during qualifying for the monaco grand prix, pérez had a bad crash. he received a concussion and spent the night in the hospital. before the canadian grand prix, he was medically checked and found to be okay. he was allowed to enter the canadian gp. after friday morning's practice, pérez said he felt sick. it was decided that he would not drive the race car anymore that weekend. the team announced that pedro de la rosa would replace pérez for the remainder of the weekend.