Mexican test driver Esteban Gutierrez will replace sick compatriot Sergio Perez in first practice at the Indian Grand Prix on Friday, the Sauber Formula One team said.
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"This should help Sergio's speedy recovery so he is able to drive for the remainder of the weekend."
A spokesman said a decision on the day's second practice session would be made later.
Perez is joining McLaren next season while Gutierrez is a frontrunner to replace him at Sauber.
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