Budapest - Daniel Ricciardo boosted Red Bull's hopes of success at this weekend's Hungarian Grand Prix with the fastest times in both practice sessions on Friday.
On a circuit that reduces power output because of its tight and twisting nature, the Red Bulls should be confident of matching Ferrari and Mercedes for race speed.
Ricciardo has been in fine form, with five podium finishes in the past six races.
The Australian driver was 0.183 seconds quicker than Sebastian Vettel's Ferrari and 0.201 clear of Mercedes driver Valtteri Bottas in the afternoon session.
As it happened: First Practice Hungarian GP
Ferrari's Kimi Raikkonen overcame a power failure that briefly forced him off track in P2 and finished fourth quickest, ahead of Lewis Hamilton's Mercedes.
In the morning, Ricciardo was 0.234 seconds quicker than Raikkonen and 0.372 ahead of Hamilton on a Hungaroring circuit that proved slippery despite warm weather conditions.
There is a final practice Saturday ahead of qualifying in the afternoon.