McLaren's Fernando Alonso has been declared unfit to compete in this weekend's Bahrain Grand Prix following his crash in Australia.
The Spaniard was part of a huge accident during the opening race of the season in Melbourne after colliding with the Haas of Esteban Gutierrez that saw his car barrel roll through the Turn Three gravel trap.
The 34-year-old had hoped to recover in time for this week's race at the Bahrain International Circuit, but following an examination on Thursday, the FIA have released a statement confirming that the two-time world champion will not be allowed to compete on safety grounds.
The statement read: "Following an examination undertaken this morning at the Bahrain International Circuit Medical Centre, it has been decided that McLaren Honda F1 Team driver Fernando Alonso should not take part in this weekend's Bahrain GP."
"Two sets of chest CT scans were compared and it was decided that there was insufficient resolution of the signs to allow him to compete on safety grounds."
Alonso's place on the gird will be taken by McLaren reserve driver Stoffel Vandoorne, who will make his Formula One debut during Sunday's race.
The Belgian is the reigning GP2 champion and had been testing in Japan ahead of the Super Formula season, but he will now head to Bahrain to compete alongside Jenson Button for the British outfit.