Valtteri Bottas closed out Formula 1 practice for the Azerbaijan Grand Prix in Baku at the head of the field after edging out Ferrari rival Kimi Raikkonen in the closing stages of FP3.
Bottas led Mercedes to the top of the classification in final practice with a fastest lap of 1:42.742 to finish 0.095 seconds clear of Raikkonen, the pair having exchanged blows in the final 15 minutes in the battle for P1.
After a mixed Friday, Mercedes appeared more comfortable through final practice as Lewis Hamilton completed the top three, four-tenths down on Bottas’ time.
Ferrari, meanwhile, was left to rely on Raikkonen at the front as drivers’ championship leader Sebastian Vettel suffered a setback.
The German driver was forced to pit with 20 minutes to go due to a problem on his car – an apparent hydraulics issue – prompting his mechanics to set to work quickly in a bid to resolve the problem ahead of qualifying.
After finishing both FP1 and FP2 as the fastest driver, Max Verstappen could not complete a hat-trick in FP3 as he was forced to park up at the side of the track late on, citing a shutdown on his car after reporting an earlier engine issue.
Joylon Palmer was another driver to hit trouble, suffering an engine fire in the early part of the session that meant he had to park up in the run-off area. After crashing out of FP2 on Friday, the already-under pressure Briton will head into qualifying on the back foot, if indeed Renault can fix his car in time.
Back on the timesheets, it was Daniel Ricciardo who followed the top three, taking fourth for Red Bull. Despite his stoppage, Verstappen did enough to take sixth in FP3, trailing Force India’s Esteban Ocon.
Felipe Massa wound up seventh for Williams ahead of Daniil Kvyat and Lance Stroll, while Sergio Perez took P10 overall.
Qualifying for the Azerbaijan Grand Prix is live on CNBC and the NBC Sports app from 9am ET on Saturday, with a re-air at 1pm ET on NBCSN.