Former world champion Damon Hill believes Max Verstappen is too young to be making his Formula One debut this weekend.
The Dutch driver will make history in Australia when he lines up on the grid to become the youngest ever grand prix driver at only 17 and after just one season of car racing.
Although Toro Rosso driver Verstappen has been labelled as an exceptional talent by many, Hill believes the move is risky for the Dutchman if he is not up to speed quickly.
"It does seem to me to be very young to enter into any complex professional sport like Formula One," Hill said ahead of the Australian Grand Prix.
"I hope for his sake that he hasn't been accelerated up to that level too quickly, because that can set you back for a very long time if you're not careful."
More title for Hamilton
Hill, on the other hand, believes Mercedes' world champion Lewis Hamilton still has plenty to offer, and he feels the Briton can still add two more titles to his resume.
"At 30, he's still got the best years ahead of him – it's when you've got talent, which he has in abundance, determination and fitness, and then start to marry that up with experience," Hill said.
"I think between now and, say, 33-34, he's certainly in contention for one, if not two, more championships."