Piastri completed 48 laps in total, ending the day fourth on the unofficial timesheets, with all of his meaningful running confined to the morning session. Aston Martin is now hoping for a clean final day on Friday, with Fernando Alonso expected to drive. Elsewhere, Racing Bulls completed its final permitted day of running with Liam Lawson and Arvid Lindblad, while Sergio Perez logged further mileage for Cadillac. With one final day of running remaining in Barcelona, Piastri and McLaren will be keen to get back on track and recover lost mileage before the focus shifts to the more representative Bahrain test next month. Results: Formula 1 pre-season shakedown Day 4 (unofficial)