International tennis fans were stunned by the sight of unmasked crowds attending exhibition matches in Adelaide on the weekend. After a cancelled Wimbledon and the US and French Opens’ empty stadiums, it was like a flashback to a pre-COVID time. “I feel like I’m watching science fiction,” tweeted one overseas observer. Players are excited to encounter their biggest crowds since the last Aussie Open when this year’s tournament kicks off on Monday next week with the Victorian Government confirming up to 30,000 spectators per day will be permitted – about 50% capacity. Also excited is Oz Open boss Craig Tiley – he’s pleased the quarantine period and addressing players’ interesting requests is behind them…