Marc Priestley Former F1 mechanic on Sports Extra 3
Carlos Sainz is having a torrid time at the moment. He can't get the car slowed down, he's snatching brakes and locking tyres at almost every big stop.
Looking at standings, it's very much multi-coloured in terms of tyres at the minute.
At this stage I'm not sure the soft experiment from Williams has really paid off while six of the current top 10 have gone for the medium as opposed to the hard.
The track is still evolving as Ferrari's Lewis Hamilton sets a 1:14.259 in P1.
Marc Priestley Former F1 mechanic on Sports Extra 3
Carlos Sainz's car just got massively unstable as he went into the entry phase in the corner. But more importantly, he has dragged gravel right across the circuit as he came back on.
There's a brief yellow flag as Carlos Sainz has a wobble going into the penultimate corner as his Williams goes into the gravel before he wrestles it back out to get to the pits.
Not the kinda corner I'd want to be doing that on, let me tell you.
'Zandvoort a challenge for drivers'published at 11:44 BST 21 August
11:44 BST 21 August
Marc Priestley Former F1 mechanic on Sports Extra 3
This is a brand new car from the one Yuki Tsunoda last drove, so to come in at a circuit like Zandvoort, which is very busy for a driving point of view: there are a lot of corners that come quickly, thick and fast after each other, and not much in the way way of long straights to relax and take a breath as a driver.
It's also very windy because it's next to the sea, and that blows sand onto the track, which can change grip levels. So there are a lot of challenges from a driving perspective.
Kimi Antonelli has breached the 1:15 barrier now with a 1:15.351 and he looks very comfortable in his Mercedes right now.
With just over 10 minutes of the session gone, Max Verstappen, Valtteri Bottas, Gabriel Bortoleto, Lance Stroll and Sergio Perez are the only drivers yet to set a time.