Sauber driver Sergio Perez has pulled out of the Canadian Grand Prix after feeling unwell during Friday's first practice session.
The 21-year-old Sauber driver has been replaced by Pedro de la Rosa of Spain, who is McLaren's test driver.
Perez was hospitalised after crashing heavily during the Monaco Grand Prix on May 29, 2011.
He was cleared to drive in Montreal after recovering from a concussion and leg injury, but the Sauber F1 team said that Perez "reported feeling unwell" after Friday morning practice and it was decided he should "miss one race on grounds of safety."
Perez said he was "deeply disappointed."
The 21-year-old Sauber driver has been replaced by Pedro de la Rosa of Spain, who is McLaren's test driver.
Perez was hospitalised after crashing heavily during the Monaco Grand Prix on May 29, 2011.
He was cleared to drive in Montreal after recovering from a concussion and leg injury, but the Sauber F1 team said that Perez "reported feeling unwell" after Friday morning practice and it was decided he should "miss one race on grounds of safety."
Perez said he was "deeply disappointed."