if Jones failed to finish. Third place in the championship was theoretically open with Laffite eight points behind Reutemann. Second place in the constructors' championship was still open with Brabham just five points behind Ligier. Qualifying Qualifying classification Race Piquet qualified on pole from Jones but used a car in fragile qualifying specification to do it. At the start Jones outlaunched Piquet but the pair refused to compromise at the first turn and the two touched, triggering a multi-car pile-up. The collision involved Jean-Pierre Jarier (Tyrrell 010), Derek Daly (Tyrrell 010), Emerson Fittipaldi (Fittipaldi F8), Keke Rosberg (Fittipaldi F8), Mario Andretti (Lotus 81), Gilles Villeneuve (Ferrari 312T5) and Jochen Mass (Arrows A3). Piquet, Fittipaldi, Villeneuve, Andretti and Mass restarted in spare cars, in Piquet's case his fragile qualifying car and Rosberg had his car repaired. Daly was out as was Thackwell as Jarier commandeered his Tyrrell 010. At the restart Jones led before a storming Piquet took the lead until his qualifying specification Cosworth DFV inevitably failed. Two laps later and Jean-Pierre Jabouille crashed his Renault RE20 heavily, seriously injuring his legs. Jabouille had to be cut from the car. Jones took up the lead again until Pironi forced his way into a lead which was clouded over a jumped start for which he was eventually assigned a 60-second penalty. Pironi took the chequer but would be classified third behind Jones and Reutemann. Alain Prost could have been third or even second until a suspension failure saw his McLaren M30 crash. Watson was ahead of Reutemann as well when he spun and finished fourth in his McLaren. Local hero Villeneuve claimed fifth for Ferrari on a dismal weekend that saw outgoing World Champion Jody Scheckter fail to qualify his Ferrari 312T5. The final point was claimed by Héctor Rebaque in his Brabham BT49 as Jacques Laffite ran out of fuel in his Ligier JS11/15 in the closing stages. Race classification Championship standings after the race Drivers' Championship standings Constructors' Championship standings Note: Only the top five positions are included for both sets of standings. Only the best 5 results from the first 7 races and the best 5 results from the last 7 races counted towards the Drivers' Championship. If different to Championship points, total points scored are shown in parentheses. References Canadian Grand Prix Canadian Grand Prix Grand Prix Grand Prix