@thegoat15: I think them being back on the grid will be an achievement in itself.
@DonovanFroon: I expect so. It had a 2015 car designed but not fully built - a picture did the rounds last year of a 2014 Marussia with a 2015 nose on it. No idea as of yet which car they would bring to Melbourne.
The boy wonder Verstappen is out on track in the Toro Rosso, looking to add to his 39 laps.
@Oliver: Now there is an interesting one. Chilton could be in the frame given the money he brings and his former ties with the team. If Marussia keeps the Ferrari engine then possibly Rossi, but then if it's entering a partnership with Honda there's an argument Magnussen could be in the frame. Lots of possibilities.
If they've kept Ferrari engines there's also a possibility Esteban Gutierrez could drive, given he's now at Ferrari. Possibly JEV too?
Verstappen sets a personal best, a 1:24.321.
Hamilton is back out there for McLaren and has just ticked over onto lap 44.
Remarkable that despite that stoppage Mercedes is still leading the mileage tab.
@NehaSingh: There are several teams operating on fine margins but I'm not going to name them for various reasons.
@CrM: Didn't you know? You've all taken a time machine back to 2012.
As CrM has pointed out, Hamilton is in the Mercedes, not McLaren!
Yesterday I said Alonso had just gone out in the Ferrari, today I do that one. Don't worry guys, Montoya is out for a spin in the Williams this afternoon.
Button returns to the track in the McLaren-Honda.
@DonovanFroon: He's still driving in IndyCar and still in great form 24/7, on and off the track.
Button's just gone green in the final sector.
@Oliver: Sorry, yes. He had done his personal best final sector.
Button returns immediately to the pits.
@Tempo: Kvyat stopped early this morning and hasn't re-emerged yet. Hardly ideal given their problems over the first three days.
@Tempo: At the moment, no.
Kimi really pounding out the laps now. He's lowered his best to a 1:23.311.
@DuncanSant: Probably a mixture of both. Looks like Kimi is on a slightly longish run at the moment.
Massa heads down the pit lane to start a new spell.
Kimi is chipping away at this benchmark, it's now down to 1:23.200.
@nicomaniac: I think you make a good point about race simulation. Certainly my belief at the moment is Mercedes is still the team to beat. Ferrari's pace is impressive but they were so far behind Merc last year that their first priority has to be overtaking Red Bull-Renault.
Grosjean improves to a 1:25.146.