Toronto IndyCar: Castroneves outpaces Penske team-mate Montoya

Aside from a brief appearance at the top by Ganassi's Tony Kanaan in the opening minutes, the morning was led by Penske cars at every step: Simon Pagenaud replaced Kanaan in first place before he in turn was beaten by Juan Pablo Montoya, who later conceded the spot when Castroneves produced a 59.6424-second lap.

That relegated Montoya to second with a time 0.2s slower, while Josef Newgarden's efforts to reverse CFH Racing's recent poor fortunes were given a boost when he finished up third-fastest ahead of reigning series champion Will Power.

The weather-related cancellation of Friday's second practice placed a premium upon maximising track time on Saturday morning, and the session was completed almost completely without interruption.

The only stoppage came right near the end, when KV's Stefano Coletti lost the rear of his car in the final corner - barely avoiding the wall - and stalled on the main straight.

His car was retrieved within a couple of minutes, although the incident capped off an eventful morning for the Monegasque, who had earlier come close to taking out Scott Dixon while sliding into the run-off at Turn 3.

Chevrolet continued to hold sway in the manufacturer war, and had the entire top 10 locked out for a good part of the session before Rahal Letterman Lanigan's Graham Rahal managed to pop up in seventh with a couple of minutes remaining.

PRACTICE THREE TIMES: