Australian Will Power's title hopes were dented by a chain-reaction crash as New Zealand's Scott Dixon tightened his hold on the Indycar series lead with victory in Toronto.
Dixon capitalised on Josef's Newgarden's error, grabbing the lead and going clear after the American clipped the wall on lap 33, to win by over five seconds from Frenchman Simon Pagenaud after 85 laps of the street circuit on Sunday.
The same lap proved fateful for Power after Graham Rahal bumped into the back of Max Chilton, setting off a chain reaction that also collected Ryan Hunter-Reay, Alexander Rossi, Sebastien Bourdais and the Australian.
While all those drivers continued in the race, time lost undergoing repairs in the pits proved costly and Power was worst off as he finished 18th.
After 12 of the season's 17 races, Dixon has 464 points while Newgarden is second on 402, followed by Rossi (394), Hunter-Reay (373) and Power (371)
The win was the 44th of Dixon's Indycar career, moving the 37-year-old within eight wins of tying Mario Andretti for second on the all-time list, which is headed by A.J. Foyt with 67 wins.
"I think A.J. is pretty safe; he's a long ways ahead," said Dixon, who is chasing a fifth series title that would leave him second to only Foyt's seven championships.
"I think for us, we take it race by race. We're in the business of winning races. If we're not doing that, I won't have a job for too long. That's the focus for right now."
