MONTREAL, May 24 : McLaren drivers Lando Norris and Oscar Piastri had a race to forget at the Canadian Grand Prix on Sunday with the team's ill-advised tyre selection at the start backfiring and their day unravelling from there. World champion Norris retired on lap 38 with a gearbox problem and Piastri finished outside the points after crashing into Alex Albon at the Circuit Gilles Villeneuve. Norris and Piastri started third and fourth on the grid but the team chose intermediates tyres for