Alonso will team up with Frenchman Esteban Ocon, on the repackaged Alpine team.
Fernando Alonso was taken to hospital after an accident in Switzerland on Thursday and he will remain under observation for a further 48 hours.
Australian Racing Group and Bathurst Regional Council say the S5000 open-wheel race event could only have gone ahead if border restrictions were lifted and mandatory quarantine periods scrapped.
Charles Leclerc claimed pole for the Singapore Grand Prix after beating Lewis Hamilton who came second.
World champion Lewis Hamilton, who had already sealed his fifth Formula 1 title, cruised to victory finishing ahead of German Sebastian Vettel, with Dutchman Max Verstappen (Red Bull) in third.
Britain's Lewis Hamilton become only the fifth man to have won four Formula One championships and the first Briton to achieve the feat when he finished ninth in the Mexican Grand Prix
The British driver seals his third straight win, seventh of the season and 60th overall.
Sebastian Vettel sets pace for Ferrari in final Chinese Grand Prix practice session
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