Sergio Perez topped the timesheets in the final practice session before qualifying for the Belgium Grand Prix.
The Red Bull driver set a best time of 1:45.047 in the dying moments of the session, going 0.137s quicker than teammate Max Verstappen.
Verstappen set his best lap during his second run on a new set of Soft tyres, with the first spoiled by a brief yellow flag.
A red flag was brought out by Charles Leclerc towards the end of the session, after he spun at high speed through the Fagnes chicane on his final Soft tyre run.
The Ferrari didn't sustain any major damage and Leclerc was able to make it back to the pits.
Result Free practice 3 - Belgian
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Ferrari wait until halfway before beginning runs
Both Ferrari drivers waited until halfway through the session before beginning their Soft tyre runs, having only done two installation laps.
Leclerc ended the session seventh quickest after spinning off, while Sainz was third fastest despite showing promising pace in the speed trap compared to the two Red Bulls.
Late laps from Lando Norris and Fernando Alonso enabled them to round out the top five, with George Russell sixth fastest.
Mercedes looked to still be struggling with the tyre temperature problems highlighted by both Russell and Lewis Hamilton yesterday, with the latter ending the session 12th fastest and 1.722s off the pace.
Sebastian Vettel put in a good effort to go eighth quickest while Esteban Ocon was ninth but felt he could've improved further had it not been for Sainz blocking his best run through Eau Rouge.
Williams pair Nicholas Latifi and Alex Albon spent most of the session in the top 10, although late laps after the red flag bumped them down to 13th and 14th fastest respectively.
Latifi ended the session with the quickest split time in the high-speed final sector, confirming the team have opted for a low-downforce set-up heading into qualifying.
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