Sebastian Vettel believes Formula 1 needs to understand why the barriers did not work properly in the accident involving Carlos Sainz during practice for the Russian Grand Prix.
Sainz crashed on the approach to Turn 13 during FP3 and his car ended underneath the barriers.
It took nearly 20 minutes for the Spaniard to be removed from the stricken Toro Rosso, and Ferrari driver Vettel said it was "shocking" to see how deep Sainz's car had gone.
"It's great that he's fine. It would be great to have him with us tomorrow," said Vettel.
"It was shocking to see he was so deep in the barriers and that he was covered by barriers.
"After Max [Verstappen]'s accident in Monaco, compared to Carlos's accident today it's very different the way the barriers work, and that's something we need to understand.
"The idea is for the barriers not to come on top of you or the car going under the barriers. It's something we need to understand."
Sainz's teammate Max Verstappen suffered a similar accident during the Monaco Grand Prix, but the Dutchman was able to get out of the car on his own.
Verstappen agrees with Vettel that something needs to be done to stop the cars from going under the barriers.
"It was not ideal. They need to find a solution for that," said Verstappen after qualifying today. "I think it shouldn't happen that it goes up. It shouldn't up, that's for sure, because it could hit his head.
"I'm sure in the next meeting the drivers will talk about it. And then they will solve it for next year..."
Although the reasons for Sainz's accident are yet to be revealed, Verstappen admitted that part of the circuit was very tricky, especially with the DRS open.
"We have run much lower than this, but we still don't know exactly what happened so we need to analyse. I couldn't feel anything strange in the car so that's the most important thing to go into tomorrow.
"I can understand because you DRS is open and you try to go as long as you can and then deactivate it yourself, and then it's very tricky under braking there in terms of locking the fronts.
"So it's easy to hit the wall. When you don't have the tyres connected to the car is very difficult to brake."