Fernando Alonso edged the Mercedes pair by a tenth of a second in the first practice session for the Singapore Grand Prix.
The FIA has drastically reduced the scope of its ban on team radio messages just hours before it was due to come into force.
Pictures from the build-up to the Singapore Grand Prix.
Fernando Alonso has criticised the media rumours suggesting he could swap places with Sebastian Vettel at Red Bull in the future.
Singapore is already one of the hardest races of the season and the new restrictions on radio communications will make life more difficult for the drivers.
Kimi Raikkonen says the new restrictions on what teams can tell their drivers on the radio could make it more difficult to manage technical problems during races.
Singapore’s thunderstorms shouldn’t interfere with the competitive sessions this weekend but drivers still have hot and humid conditions to contend with.
Don’t miss any of the Singapore Grand Prix sessions – here are the times for all of this weekend’s action.
Pirelli has stepped away from its policy of bringing more conservative tyres this year by selecting the soft and medium tyres for the upcoming Belgian Grand Prix.