Bottas won the event 12 months ago while plenty of attention will head towards Leclerc. The two are likely to become rivals next season as they go head to head in a Mercedes and Ferrari.
The second Sauber driver, Marcus Ericsson will join his team-mate. Ericsson is yet to sign a deal for next season as deadlines begin to step up.
Sirotkin will also be on the panel. He's had a testing season in the Williams car. His future also looks to be in doubt as we head towards the final stages of the season.