Lewis Hamilton continued to set the pace at the US GP as he topped Practice Three, but title rival Sebastian Vettel was less than a tenth behind.
Max Verstappen is set to join Nico Hulkenberg, Stoffel Vandoorne and F1 debutant Brendon Hartley in taking Austin grid drops.
Daniil Kvyat has told Sky F1 he has a "Plan B and Plan C" should he permanently lose his Toro Rosso seat at the end of 2017.
Mercedes boss Toto Wolff believes Lewis Hamilton has "gone up a level" after the championship leader enjoyed another perfect day.
McLaren boss Zak Brown has admitted they face a "critical" season in 2018 as they aim to achieve success with Renault engines.
Ferrari have changed Sebastian Vettel's chassis for the rest of the US GP weekend after problems in Friday practice.
Max Verstappen approached Red Bull about signing a new deal with the former world champions, according to team advisor Helmut Marko.
Lewis Hamilton made the ideal start to a potential championship-clinching weekend by topping a wet-dry Practice One at the US GP.
Eric Boullier claims McLaren have the "best driver line-up" for 2018 after Fernando Alonso's renewal. But is he right?
Will both world titles be settled? Have Ferrari fixed their reliability? And it's all change at Toro Rosso as Sainz makes Renault debut.
Sebastian Vettel has insisted Ferrari aren't panicking and can still have a say in the fight for 2017's world titles.
Lewis Hamilton hasn't ruled out taking a knee ahead of the United States GP - but stressed he stands alongside the movement which has split America in recent weeks.
Lewis Hamilton maintained his perfect start to the United States GP weekend as he topped both of Friday's practice sessions.
Max Verstappen says he is considering "all scenarios" as the Red Bull driver weighs up his future options in Formula 1.
Fernando Alonso says he has agreed a "long-term partnership" with McLaren and wants to finish his career with the team.
It's a journalists special on this week's F1 Report as Alan Baldwin and Rebecca Clancy join Natalie Pinkham to look ahead to the US GP.
Lewis Hamilton is currently the only Brit on the grid, but the future is still looking bright for British motorsport.
Lewis Hamilton can clinch his fourth world title in Austin, and you can watch all the action live on Sky F1.
Despite possessing 2017's fastest car, Ferrari's season has spectacularly unravelled. How and why did it all go wrong?
Ferrari are under huge pressure to resolve their reliability issues and keep the title races alive at the US GP, the F1 Report panel says.