Seven-time Formula One champion Lewis Hamilton has been linked with a shock move from Mercedes to Ferrari next year, according to reports on Thursday.

Sky Sports News said Hamilton would leave Mercedes after the 2024 season and replace Carlos Sainz Jr. at Ferrari, adding that Mercedes chief Toto Wolff would brief the team before a formal announcement later Thursday. It cited multiple senior sources within F1. ESPN also reported the move was “as good as done,” citing multiple sources.

When contacted by The Associated Press, Mercedes and Ferrari declined to comment on if Hamilton will join Ferrari. NBC News has not independently confirmed the reports.

The move would surprise many F1 observers because the 39-year-old British driver signed a new two-year deal last summer until 2025, although it remains unclear whether the deal contained an escape clause.

Hamilton won six titles with Mercedes in seven years from 2014-20 and lost the 2021 championship to Red Bull’s Max Verstappen on the final lap of the last race. He has not won a race since 2021 and remains stuck on a record 103 wins.

If he joins Ferrari he would likely replace Sainz, considering Sainz’s teammate, Charles Leclerc, recently signed a multi-year contract extension.

Hamilton joined Mercedes in 2013 from McLaren in what was also a surprise move at the time.

After dominating to 2020, Hamilton and Mercedes have been frustrated in the past two seasons. Mercedes won only one race in 2022 when the car suffered from a bouncing effect, known in F1 as porpoising. The team admitted getting the design wrong.

Hamilton’s teammate George Russell, in his debut season, won that 2022 race, and neither driver won a race last year.

Preseason F1 testing begins on Feb. 21 in Bahrain. Bahrain also hosts the first of a record 24 races on March 2, when Verstappen starts his bid for a fourth straight world championship.