Lando Norris lost 45 minutes of track time on Friday, June 26, due to a hydraulics leak at the Austrian Grand Prix.
What happened?
The McLaren driver is already on the backfoot after the issue in first practice.
Why it matters for Lando Norris
Norris's unreliability issues come as a blow to his chances at the Red Bull Ring.
Kimi Antonelli led a Mercedes one-two in first practice, with George Russell close behind.
What comes next?
Norris will look to bounce back in second practice, which starts at 4pm on Friday, June 26.
The British driver finished the session well down the order, but will hope to make up for lost time.
Antonelli, who leads the Drivers' Championship by 41 points, ended up on top by 0.040s.
Max Verstappen and Isack Hadjar also suffered reliability issues, with Verstappen unhappy with the balance of his car.
Sky Sports F1's Karun Chandhok said the issues were not ideal for Red Bull or McLaren.
The Austrian Grand Prix continues on Saturday, June 27, with qualifying at 3pm.
Lando Norris will be looking to put his unreliability issues behind him and challenge for a strong result.
The McLaren driver has a tough task ahead of him, but will be determined to make a comeback.
Friday's second practice will be crucial in determining the grid for Saturday's qualifying session.
And Norris will be hoping to get back on track and start making up for lost time.
But for now, the British driver is playing catch-up after a difficult start to the weekend.
So the focus will be on getting the car right and preparing for the challenges ahead.
The Austrian Grand Prix is shaping up to be an exciting weekend of racing.
With the top drivers all looking to make a strong impression, it's going to be a closely fought competition.
Lando Norris will be looking to get back in the mix and challenge for a top result.
The action continues on Saturday, June 27, with qualifying at 3pm.
It's going to be a thrilling weekend of Formula 1 racing at the Red Bull Ring.