Tuesday saw a number of changes of scenery in pre-season testing, mainly on the body of the Mercedes W10, so will Wednesday see further tinkering from the reigning champions? There were also some familiar faces in the paddock – Stoffel Vandoorne and Fernando Alonso – with all eyes on the latter's movements in the McLaren garage.
Day one of test two came with mixed fortunes for McLaren as Lando Norris logged the quickest lap time but also stopped on track twice.
There was finally some positivity at Williams as George Russell put in 118 laps – only Kevin Magnussen and Pierre Gasly managing more.
The likes of Max Verstappen, Robert Kubica and Kimi Raikkonen will return to action for day two, while Mercedes, Ferrari and Renault are expected to continue with their alternating schedules which will see both drivers taking part.