Another talking point from the shock transfer is who would replace Hamilton at Mercedes for next year, with several names being mentioned in the running for the vacant seat.
Speaking in an interview with Lawrence Barretto on Sky Sports, the F1 pundit asked Piastri and team-mate Lando Norris for their bold prediction ahead of the new season.
To which the Aussie responded: “My bold prediction… Fernando Alonso to Mercedes.
The Spaniard has been linked with a move to the Brackley-based team and is out of contract at the end of the season, but is looking to see where Aston Martin stand this year before making a decision.
The 22-year-old was over two seconds behind the pacesetters on both days - Max Verstappen on Wednesday and Carlos Sainz on Thursday – but he insists that the team have taken a ‘step forward.’
Speaking in the driver press conference following testing about whether the team had improved weaknesses such as handling and low speed corners, he said: “I think certain aspects of that we've improved.
“I think we still have work to do on some things, but certainly some aspects of the low speed handling and just the handling in general, I think we have made a step forward on.
“I think as Andrea [Stella] has kind of said in the lead up, we've not been able to tackle everything In the time that we've had in the offseason, so there's still a lot of hard work going on to fully make the car a bit nicer to drive.
“So yeah, I mean, it's quite familiar from last year, as you would expect to think, all these cars across the grid are very dominated by the regulations.
“So I think nobody's car is going to be feeling wildly different to one another, so I think any differences are going to be pretty small, especially if you're in the same team from year to year.
“So some improvements, but definitely still some areas where I want to make some decent steps forward.”