2013 Canadian Grand Prix practice session photo Photo 17 of 107
Force India's Paul di Resta was the surprise pacesetter in an opening practice session at the 2013 Canadian Grand Prix on Friday that was marked by continually changing track conditions.
Circuit Gilles-Villeneuve, Montréal, Québec, Canada June 7, 2013, 1:01 p.m. The Vodafone McLaren Mercedes team practicing pit stops. Auto123.TV 2013 Photographer: Philippe Champoux | © auto123.com