Baku, March 9, AZERTAC
Haas are exploring the possibility of former driver Kevin Magnussen replacing Mazepin ahead of the new season, according to Sky Sports.
Magnussen, who raced for Haas for four seasons before the team let him go at the end of the 2020 campaign, has also previously driven for McLaren and Renault.
The Dane has been exploring different forms of racing since his departure from F1, competing in the IMSA SportsCar Championship and IndyCar Series, but now looks set to race alongside German Mick Schumacher when the season starts in Bahrain on March 20 - live on Sky Sports.
Brazilian reserve Pietro Fittipaldi will test for Haas in Bahrain on Thursday following the departure of Mazepin.
A spokesman said the cars had arrived late at the Sakhir circuit on Tuesday after the air freight was delayed by a technical issue.
"This delay will impact our programme but we are targeting being out on track for the second session Thursday afternoon with Pietro Fittipaldi driving the VF-22," he said, giving no further details.
Fittipaldi, the grandson of two-time world champion Emerson, stood in for Romain Grosjean at the 2020 Sakhir and Abu Dhabi Grands Prix.
Haas finished last in 2021 and were the only team not to score a point after focusing fully on developing their car for this year's major rule changes.
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