F1 title contenders Red Bull and McLaren have unveiled the upgrades they have brought to the US Grand Prix.
The Circuit of the Americas from Austin, Texas hosts the latest round of the season, with Red Bull looking to get back on top after failing to win at any of the last eight rounds.
The US Grand Prix has long been circled on Red Bull's calendar as the event to get back on track and return to winning ways.
It has slipped back in the pecking order during the second half of the campaign, however Max Verstappen has managed to maintain his lead in the drivers' standings, with the gap sitting at 52 points to Lando Noris.
Red Bull has brought a new floor to the event, which features a “revised edge wing camber over rearward third” in order to produce more local load.
It has also brought a revised engine cover to the weekend to improve cooling.
However, McLaren has not sat still as it looks to make inroads on Verstappen's drivers' title lead.
The Woking-based squad, who currently sit atop the constructors' championship, has brought a plethora of fresh upgrades - including changes to the front wing, front and rear suspension and the front brake ducts.
It too has placed focus on improving cooling, with specific modifications made to the brake ducts while a revised beam wing aims to reduce drag.
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Mercedes' fresh parts for the weekend include adaptations to the front wing, front suspension and floor with cooling-specific upgrades centred around the engine cover and sidepod inlets.
Aston Martin has also brought a significant upgrade to Austin, placing focus on the front wing, engine cover, floor and rear diffuser.
A new floor, as well as a reprofiled rear wing and engine cover will be utilised at Alpine - but only on Pierre Gasly's car for the weekend.
As it looks to make a strong impression at its second home race of the year, new parts have also been attached at Haas, who currently sit just three points behind RB in the standings.
RB is looking to maintain its advantage over Haas with a new floor at COTA this weekend, while Stake is looking to claim its first point of the seas with modifications to the front wing, front and rear suspension and rear brake duct deflectors.
Ferrari and Williams did not list any upgrades for the US Grand Prix.
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