Honda are wanting an answer on the Sauber engine deal "now", that's according to their F1 chief Yusuke Hasegawa.
Chasing fifth place in the Constructors' Championship, Renault boss Cyril Abiteboul says the team needs to secure their first double-points haul of the campaign in Hungary.
Williams technical chief Paddy Lowe says there is no "black and white" answer on when to shift focus from this season to next year.
Dropped by Sauber at the end of last season, Felipe Nasr is hoping to return to the F1 grid but concedes it is not easy given that there are only 20 seats available.
Honda junior driver Nobuharu Matsushita will make his Formula 1 debut at the post-Hungarian Grand Prix test with Sauber.
The Hungarian Grand Prix, which takes place at the Hungaroring in Budapest, marks the 11th round of the 2017 season.
Force India gets ready for round eleven of the season in Budapest, the final race for the summer break.
Robert Kubica has been confirmed for the upcoming post-Hungarian GP test, handed the driving duties by Renault on Day Two.
Having completed the first of his FP1 sessions with Haas at Silverstone, Guenther Steiner says Antonio Gionvinazzi may be a rookie but he is one with a great deal of experience.
Despite recent headlines claiming he could retire at the end of this season, Lewis Hamilton says he has "five or six years" left in Formula 1.
Nico Hulkenberg is keen to build on his British showing when F1 heads to Hungary while Jolyon Palmer hopes his bad luck is in the past.
Sauber will introduce a big aerodynamic update package at the Hungarian GP with Marcus Ericsson hoping that it will be a "good step" forward.
The Singapore race, along with the Chinese Grand Prix, was marked as provisional when the 2018 F1 calendar was released last month.
Williams won't rush into signing drivers for next year's championship with Claire Williams saying their focus right now is on the race track.
Handed a further two points for an unsafe rejoining of track at the British Grand Prix, Daniil Kvyat is leading F1's penalty points table with nine on the board.
Toto Wolff insists that as long as both drivers are in contention for the World title, Mercedes will not interfere in their racing.
Acknowledging that he wants to stay at Mercedes for next year's championship, Valtteri Bottas says the ball is firmly in Mercedes' court.
Stoffel Vandoorne says he need not bother following F1's silly season rumours, after all he has a "long-term contract" with McLaren.
Romain Grosjean and Kevin Magnussen will remain at Haas next season, "that is a given" says Gene Haas.
Failing to make the starting grid at his home race at Silverstone, Jolyon Palmer is hoping that he has now "burnt the unlucky underpants" and can finally start scoring.
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