Belle Vue have confirmed this Saturday’s British Youth Championship decider will go ahead behind closed doors.
The National Speedway Stadium is Covid-19 compliant but the decision has been taken based on increasing infection rates in the Manchester area.
CEO Adrian Smith said: “Like all sports, we are absolutely committed to getting supporters back into stadiums as quickly as possible.
“However, that decision needs to be balanced with a wider consideration of how the coronavirus is affecting the region you operate in.
“The decision not to allow supporters to attend the British Youth Round on Saturday has not been taken lightly.
“We take the safety of everyone involved in Speedway extremely seriously and that includes our supporters.
“While we are currently fully entitled to stage an amateur race meeting with spectators, we also recognise that we are operating in a fast-changing environment.
"What we might announce today can change tomorrow and we have therefore, taken the decision early to allow supporters who have bought tickets to re-plan their weekend.
“We are of course disappointed not to be able to invite supporters back to the stadium but hope they will understand the decision against an increasing regional risk.”
The Aces will provide further details regarding the processing of refunds from online sales shortly.