Ferrari reserve driver Zhou Guanyu will replace Lewis Hamilton during Friday’s Pirelli tyre test at Mugello, as Hamilton stays away amid concerns over his dog Roscoe’s health. The change comes amidst Ferrari’s preparations for the 2026 Formula 1 season and marks a rare absence for the seven-time World Champion at important team events.
Reasons Behind Hamilton’s Absence from Ferrari’s Tyre Testing
Ferrari and their customer team Haas are conducting tests this week at the Mugello circuit to assist Pirelli in developing tyres designed for the 2026 F1 calendar. Hamilton was originally scheduled to share Friday’s driving responsibilities with Ferrari teammate Charles Leclerc, focusing on evaluating the hardest tyre compounds planned for next year.
However, Pirelli announced on Thursday evening that Zhou Guanyu will take Hamilton’s place, with no formal explanation offered for the seven-time World Champion’s withdrawal. Observers suggest the decision is linked to a personal matter involving Hamilton’s English bulldog, Roscoe, who faced a serious health scare on Wednesday. Hamilton posted an emotional request on social media, urging fans to keep Roscoe in their thoughts during this difficult time.
Everyone please keep Roscoe in your thoughts and prayers.
Lewis Hamilton, F1 driver
Implications for Ferrari and the F1 Driver Lineup Amid Mugello Tests
Italian journalist Rosario Giuliana indicated on social media that Hamilton’s decision to skip the test was understandable, given the canine’s condition. His absence means Ferrari relies on reserve drivers to continue their tyre development program effectively. Zhou’s appearance comes after he and Arthur Leclerc, Charles Leclerc’s younger brother, completed runs with Ferrari’s 2023 car at Mugello on Thursday.
Meanwhile, Haas drivers Esteban Ocon and Oliver Bearman conducted their own sessions on Thursday, testing Pirelli’s hardest tyre compounds in variable weather conditions. Ocon completed 40 laps in dry conditions, followed by Bearman’s 30 laps on intermediates once rain arrived later in the morning.
Haas is scheduled to continue with Testing of Previous Car (TPC) sessions on Friday, featuring the return of Romain Grosjean, who last drove an F1 car during his crash-ending accident at the 2020 Bahrain Grand Prix. Grosjean will share duties with James Hinchcliffe, the former IndyCar driver, who is making his debut in F1 machinery while filming for F1 TV.
Technical Developments and Context of the Mugello Testing Program
Several teams are contributing mule cars — heavily modified versions of existing F1 cars designed to simulate the aerodynamic forces expected in 2026 — as part of Pirelli’s tyre development process. Ferrari has experimented with advanced features such as a moveable DRS-style mechanism on the front wing of its mule car, aiming to replicate the upcoming active aerodynamic systems planned for next season.
This comprehensive testing at Mugello is crucial for preparing Pirelli’s compound range under real-world conditions, especially given the expected shifts in car performance and tyre behavior in 2026. Ferrari’s ability to gather data despite Hamilton’s absence remains vital as the team seeks a competitive edge in the coming season.
Looking Ahead: What Hamilton’s Absence Means for Ferrari
Lewis Hamilton missing this tyre test highlights the personal challenges the driver currently faces, juxtaposed with the intense demands of Formula 1. His replacement by Ferrari reserve Zhou Guanyu allows the team to maintain momentum in preparations for the new regulations next year. However, Hamilton’s absence from such key technical sessions may influence Ferrari’s internal dynamics and driver familiarity with the updated equipment.
The situation also underscores how unforeseen personal events can impact even the most professional sporting environments. As Ferrari and Haas continue their testing programs at Mugello, observers will watch how Hamilton reintegrates with the team once circumstances allow and how Zhou’s involvement may offer opportunities for showcasing talent within the Ferrari driver structure.
