South Australia’s border with Melbourne slammed shut last night and thousands of travellers are being urgently traced, amid mounting concern over Victoria’s Covid-19 outbreak sparked from an Adelaide medi-hotel coronavirus leak. A man has been arrested and two junior footballers have been suspended over an ugly melee at an SANFL Juniors under-17’s  girls’ match on the weekend. Drivers are being urged to back off to prevent “catastrophic” crashes amid an increase in fines issued for tailgating on South Australian roads.And in sport, Richmond has suffered another serious blow in its quest for a third successive premiership, with star forward Tom Lynch set to miss “five or six weeks” due to a knee injury.For updates and breaking news throughout the day, take out a subscription atadvertiser.com.au