In overcast and cooler conditions compared to the Friday running, the drivers had to spend lots of time carefully preparing their tyres to get them in the correct temperature window with multiple warm-up laps on the low-grip surface at Portimao.

The final one-hour practice session was something of a slow burner, with most teams keeping their cars in the garage during the opening 10 minutes, leaving the two Haas drivers to trade the early fastest times.

Mick Schumacher set the P1 benchmark at 1m23.026s on the medium tyres, just before he spun off backwards running through the long, downhill right-hand final corner on his next slower lap.

He quickly got going from the low-speed incident and improved first place with a 1m22.77s before teammate Nikita Mazepin briefly took the top spot on the soft tyres until Schumacher improved again on his next flying lap with a 1m21.776s.

Just before the 15-minute mark, most of the rest of the pack joined the fray, with Kimi Raikkonen the first to try a flying lap on the softs, which he quickly had to abort for running too wide at the exit of Turn 1.

It was Yuki Tsunoda who finally pushed the Haas drivers off the top times with a 1m20.997s on the mediums before several drivers, led by Raikkonen, enjoyed a spell in first place as the benchmark continued to fall.

The Mercedes drivers completed just an installation lap during the opening 20 minutes, while Verstappen did not appear until just after Esteban Ocon had brought the fastest time down to a 1m19.672s on the medium tyres as the session's first third ended.

The Black Arrows cars and Verstappen then headed out for their first real runs straight on the soft tyres, but all three were initially frustrated by a brief virtual safety car, which was activated after an advertising hoarding that had blown over in the runoff beyond the final corner was re-erected by the marshals.

When green flag conditions returned after a couple of minutes, Charles Leclerc took first with a 1m19.001s on the softs, which was almost immediately beaten by Sergio Perez's 1m18.840s.

But that too was soon better, this time by Hamilton's 1m18.755s, just after Raikkonen had briefly brought out yellow flags with a quick spin exiting the Turn 8 double apex right, losing the rear as he got on the power exiting the corner's second part.

After a lull in action following the session's halfway point, Verstappen moved to the head of the times with a 1m18.545s, gaining time on Hamilton as the lap went on and jumping ahead with the fastest third sector.

There were few improvements at the head of the order as the final 10 minutes approached before Hamilton established a personal best but remained second – the gap to Verstappen cut to 0.180s.

But the Red Bull driver wasn't finished, as Verstappen put in a remarkable effort to set the session's fastest time, a 1m18.489s, but did not set any personal best or fastest overall sectors.

That put Verstappen 0.236s clear of Hamilton when the session ended, with Valtteri Bottas third 0.331s adrift of the top spot and Perez ending up fourth, just 0.02s slower than the second Mercedes.

Verstappen appeared to be going for one final flying lap in the dying minutes, but he had to back off after running beyond the Turn 1 exit track limits and then locking up and going deep at Turn 3.

Ocon gained time when he switched to the soft tyres during the session's second half and slotted into fifth, ahead of Leclerc and Carlos Sainz in the second Ferrari.

Lando Norris was another spinner, losing the rear of his McLaren as he got on the power early in the final corner with 15 minutes remaining and going off backwards before quickly getting going again.

He ended up eighth ahead of Pierre Gasly and Raikkonen.

Mazepin, who brought up the rear of the field and had a brief off beyond Turn 11 late on, as he lost the rear of his car running on the outside line around the slowly touring Perez and skating into the gravel as a result.

Cla	Driver		Chassis	Laps	Time
1	Max Verstappen	Red Bull	21	1'18.489
2	Lewis Hamilton	Mercedes	21	1'18.725	0.236
3	Valtteri Bottas	Mercedes	19	1'18.820	0.331
4	Sergio Perez	Red Bull	25	1'18.840	0.351
5	Esteban Ocon	Alpine	19	1'18.860	0.371
6	Charles Leclerc	Ferrari	23	1'19.001	0.512
7	Carlos Sainz Jr.	Ferrari	24	1'19.050	0.561
8	Lando Norris	McLaren	18	1'19.272	0.783
9	Pierre Gasly	AlphaTauri	26	1'19.374	0.885
10	Kimi Raikkonen	Alfa Romeo	26	1'19.415	0.926
11	Yuki Tsunoda	AlphaTauri	25	1'19.485	0.996
12	Daniel Ricciardo	McLaren	19	1'19.582	1.093
13	Antonio Giovinazzi	Alfa Romeo	23	1'19.588	1.099
14	Fernando Alonso	Alpine	20	1'19.949	1.460
15	Mick Schumacher	Haas	22	1'20.033	1.544
16	Lance Stroll	Aston Martin	17	1'20.090	1.601
17	George Russell	Williams	18	1'20.127	1.638
18	Sebastian Vettel	Aston Martin	21	1'20.214	1.725
19	Nicholas Latifi	Williams	19	1'20.681	2.192
20	Nikita Mazepin	Haas	20	1'20.690	2.201
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