Norris leads Sainz and Leclerc in wet FP1 in Canada

A last-gasp effort from Norris – still contending with some patches of water – put him P1 on 1m 24.435s, with Sainz three-tenths back in second, Leclerc the best part of a second slower in third and Hamilton 1.5s adrift.

Max Verstappen put his Red Bull fifth, from the other McLaren of Oscar Piastri, Alpine’s Pierre Gasly, Kick Sauber’s Valtteri Bottas and team mate Sergio Perez, with George Russell rounding out the top 10 in his Mercedes.

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RB pair Daniel Ricciardo and Yuki Tsunoda and Haas duo Kevin Magnussen and Nico Hulkenberg followed in P11 to P14, with Aston Martin team mates Fernando Alonso and Lance Stroll – split by the Williams of Logan Sargeant – the last drivers to post a time.

Home favourite Stroll was seen running over the grass during his late run on soft tyres, but he at least avoided the same fate as the sidelined Zhou, while FP1 runner Doohan and Williams driver Alex Albon brought up the rear.

With the first session behind them, drivers and their teams will debrief in the paddock before returning to the track for second practice at 1700 local time – current weather forecasts predicting more rain to fall between now and then.