The Blues, who have players attending the two Newcastle high schools impacted by the latest COVID-19 cases, sidelined at least a dozen teams from under-9 to under-13 competitions as a precautionary measure.

This was also the case for City's older age groups.

AFL HCC officials, following a board meeting held on Saturday morning, revealed they had postponed all-but one game in the under-15 and under-17 competitions, both boys and girls, due to the global health pandemic.

In the senior ranks, the Muswellbrook Cats cancelled encounters at home against Terrigal Avoca (men's plate) and Gosford (women's plate).

Nelson Bay's under-9 team, who had a player test positive to coronavirus last month, have now completed a 14-day isolation period and were set to return on August 9 before the last-minute rescheduling of round four.

Nelson Bay and Port Stephens senior sides did not feature on July 25. Dates have yet to be announced about those catch-up matches against Warners Bay (men's and women's Black Diamond Cup).

The Black Diamond Cup men's competition went ahead on Saturday with Terrigal Avoca (11.11-77) prevailing over Killarney Vale (6.9-45) by 32 points in a top-of-the-table clash.

Singleton (10.9-69) edged out Cardiff (10.5-65), City (15.12-102) beat Nelson Bay (11.6-72), Warners Bay (13.15-93) accounted for Wyong Lakes (6.5-41) and Maitland (8.7-55) were defeated by Gosford (15.7-97).

City, Cardiff, Killarney Vale and Wyong Lakes were winners in the women's division.

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