Lotus was forced to miss the start of Friday practice without tyres due to a financial dispute.
Force India remains unsure what caused Sergio Perez's dramatic practice accident in Hungary.
Red Bull Racing could be in the mix in Hungary after showing strong practice pace on Friday.
Lewis Hamilton has topped the times in a dramatic free practice one in Budapest
Daniel Ricciardo has tied his future with Red Bull Racing to its supply of competitive engines.
F1 drivers remain committed to 100 per cent racing despite Jules Bianchi's tragic death.
Daniel Ricciardo is looking forward to Budapest despite being unable to defend his 2014 win.
Valtteri Bottas is hoping hot weather will mask an expected difficult weekend for the Williams team.
Carlos Sainz says STR has room for improvement despite unreliability robbing the team of points.