Is Ferrari really as quick as the Jerez timesheets suggested? And when will Mercedes reveal its hand? Kate Walker asks the crucial questions.
On Friday test and reserve driver Giedo van der Garde will be driving the C33 during the first free practice.
Medium and Soft tyres for one of the shortest but most intense laps of the year.
Red Bull preview for the next two F1 events...
Roberto Merhi to drive in FP1
Lewis Hamilton: "I haven't had the best races there [Austin] so far, but I'm determined to change that this year.
Toto Wolff: "With five races to go and three points separating Lewis and Nico, it is now a straight fight between the two of them and each will be looking to gain the first advantage in Suzuka, one of the best driver's circuits in the sport."
Heavy rain is the only hope for Mercedes' rivals at Sepang, but all eyes will be on Fernando Alonso from Thursday.
With an average speed of 225km/h (139mph), Suzuka is one of the fastest circuits on the F1 calendar.
Medium and soft tyres for the first brand new circuit since Austin.
From 31st October to 2nd November, the 17th of 19 rounds of the 2014 FIA Formula One World Championship will take place on the Circuit of the Americas in Austin.
Daniel Ricciardo: "...if it rains, then who knows – maybe the front row can be possible.”
There's plenty to talk about as the Italian Grand Prix weekend gets underway.