Hamilton takes pole, Bottas 2nd, Verstappen 3rd
Hamilton could break all-time race win record at Portimao
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Both Mercedes cars improve their times and Lewis Hamilton is now the quickest of the weekend with a 1:16.931. That's six tenths faster than Valtteri Bottas.
Remember, Hamilton needs one race win to overtake Michael Schumacher's 91 and take the outright record. Bottas is going to have to be at the top of his game to ensure Hamilton doesn't get pole position later on.
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Jolyon Palmer
Former Renault driver on BBC Radio 5 live
It's pretty clear that Alex Albon needs to up his game to retain his seat and Albon will know that - it won't be a big surprise.
He's been doing OK but the worry is he hasn't stepped up since the first weekend. People say he's improving but it's difficult to see and that's the disappointment for Red Bull.
He's no longer a rookie, he's been with the team a year, he's still off Max Verstappen and there is pressure in that situation - just ask Pierre Gasly and Daniil Kvyat.
Valtteri Bottas was fastest in session one and session two and he's the first to set a time today - 1:17.888. That's on the soft, with Lewis Hamilton on the same tyres, but is 0.028 behind.
Andrew Benson
BBC Sport’s chief F1 writer
Alex Albon is running out of time to secure his Red Bull seat for 2021. Team principal Christian Horner said: “We want Alex to claim that seat and justify that there is no need to look at any other alternative than Alex. Everyone in the team wants to see him do that.
"In Mugello it started to look like he had started to turn the corner. He’s had a couple of difficult weekends so he needs to bounce back here and particularly Imola with a strong weekend from start to finish. He’s a popular member of the team but we need two cars closer together in order to fight the Mercedes. That’s what we’ve got to do.”
If Albon is dropped, Horner says Red Bull would look outside their driver pool for a partner for Max Verstappen - which means Sergio Perez or Nico Hulkenberg. “If we had to look at a different solution, we would have to look outside the Red Bull pool of drivers simply because there is not one available we would look to put in. There are some quality drivers on the market that could be unemployed next year.”
It's the three hardest compounds from Pirelli this weekend and the softs got limited action yesterday because of the stop-start nature of second practice after a tyre test in the first 30 minutes.
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We have the rare sight of some fans in attendance this weekend and a queue of cars in a traffic jam trying to get into the circuit. They want to hurry up, they've only got until 12:00 before the session is done.
We're under way. Just the hour for third practice.
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Did the stewards make the right decision to not penalise Verstappen and Stroll?
Sulaimon Adelekan: Right and correct decision from the stewards not to penalise Lance Stroll and Max Verstappen. They collided during an overtake by Verstappen and it's all part of the sport.
We are live so press the play button at the top to listen to our excellent team of Jack Nicholls, Jolyon Palmer, Jennie Gow and Andrew Benson.
But Daniil Kvyat didn't enjoy Friday's action.
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"Tricky", was Lando Norris' verdict.
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Amazing, but tough, says Nicholas Latifi.
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Esteban Ocon felt like he was flying...
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As was Romain Grosjean...
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Carlos Sainz was very much in favour.
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This is the first time a Formula 1 race weekend has been staged at Portimao and it certainly looks spectacular with blind corners, drops, climbs, fast lefts, fast rights and a fantastic setting.
But the reaction from the drivers was a bit mixed.
Did the stewards make the right decision to not penalise Verstappen and Stroll?
That's the first chat topic for this Saturday.
Did the stewards make the right decision to not penalise Verstappen and Stroll and why?
Tweet us using the hashtag #bbcf1 to have your say.
Andrew Benson
BBC Sport’s chief F1 writer
Max Verstappen and Lance Stroll escaped punishment following an investigation into a crash during practice at the Portuguese Grand Prix.
The pair collided as Verstappen tried to overtake Stroll after they had raced down the pit straight.
Stewards called both drivers to give evidence and ruled that neither was "wholly or predominantly at fault". Mercedes' Valtteri Bottas was fastest overall in the session from Verstappen, with Lewis Hamilton eighth.
Red Bull's Verstappen swore over the radio immediately after the crash between the two drivers, asking what Stroll, of Racing Point, thought he was doing.
Stroll had passed Verstappen at the final corner of the previous lap. Verstappen attempted to pass back at the start of the next lap, but Stroll turned in.