Lance Stroll and Kevin Magnussen have both been hit with grid penalties for the United States Grand Prix after on-track incidents during Formula 1 qualifying at the Circuit of The Americas on Saturday.

Stroll qualified 17th after suffering from a deployment problem on his Williams FW40 during Q1, but was caught up in an incident with Romain Grosjean that saw the Haas driver take to the grass in evasive action.

Stroll slowed and moved to the right-hand side of the track at Turn 19 in order to allow Daniil Kvyat through, only to put himself in Grosjean's path and force the Frenchman to think fast to avoid a collision.

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The stewards acknowledged that Stroll "did what he could", but nevertheless felt it was "potentially a very dangerous situation", warranting a three-place grid penalty for the Canadian.

Magnussen was also handed a three-place grid penalty after blocking Sergio Perez while the Mexican was on a hot lap in Q1, with the Dane freely admitting after the session he deserved to be sanctioned for his misdemeanour, having qualified P20.

Both drivers will however gain places from their qualifying positions due to penalties for other drivers. Stroll will start 16th, while Magnussen will line up 18th as Nico Hulkenberg and Brendon Hartley drop to the last row of the grid.