George Russell has warned rain could affect Australian Grand Prix qualifying.
Wet weather disrupted second practice at the Albert Park Circuit with only 13 minutes of dry running possible, before drivers took to the track on intermediate tyres as the rain worsened in the final third of the hour-long session.
The British driver finished ninth in FP1 but rose to fourth in the second session having made a raft of set-up changes on his W14.
Assessing his Friday, Russell said: "FP2 was a bit frustrating for everybody with the weather coming in a little bit surprisingly.
"But it was a reasonable session for us, we definitely made a step from FP1 which is a good thing, let's see what tomorrow brings with the weather because there was a little bit of rain in the area but it came in quite suddenly.
"I know there is a little bit of rain around tomorrow as well so we would be happy for things to be spiced up."