The Ashes series match referee David Boon has tested positive for COVID-19, Cricket Australia has confirmed.

Boon will now miss the fourth Test, starting on January 5, but is expected to return to take charge of the fifth Test nine days later.

The official is fully vaccinated – including a booster shot – and is asymptomatic. He will quarantine in Melbourne for 10 days before travelling to Hobart, where the final Test is set to be held.

Steve Bernard will serve as the referee in Boon's absence.

Boon is not the only person to miss out on the fourth Test, with England coach Chris Silverwood finding himself in the same position after a close contact contracted coronavirus.

There were four positive COVID-19 cases in the England camp on the second day of the third Test, but none of the players were affected.

Australia have already secured the Ashes, having won each of the first three Tests comfortably to move into an unassailable 3-0 series lead.

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