Williams Formula 1 driver Felipe Massa set the pace in a rain-hit second practice for the Russian Grand Prix, as only eight drivers set a time.
The Brazilian clocked a 2m00.458s on the full wet tyres at the Sochi Autodrom as rain fell throughout the session.
Drivers bemoaned the slippery conditions, with several getting caught out by the large amounts of standing water on the track.
It compounded a frustrating day for the pitlane as a “significant diesel spillage”disrupted the start of first practice.
As a result, teams will have to complete a packed-programme in final practice on Saturday to make up for lost time.