Morning mail: Djokovic airport drama, aged care Covid outbreak, Capitol riots anniversary

Thursday: World no 1 Novak Djokovic held at Melbourne airport after being granted an exemption to play in the Australian Open. Plus: a guide to standup paddleboarding

Good morning. Novak Djokovic spends hours at Melbourne airport over visa mix-up, data confirms Donald Trump's enduring hold over vast sections of America and Covid concerns in a Sydney nursing home.

The world No 1 men's tennis player Novak Djokovic has been held at passport control in Melbourne for several hours, throwing fresh doubt over his participation at the Australian Open. It comes after the reigning Australian Open champion was announced he had been granted a Covid-19-related medical exemption" by tournament organisers. Scott Morrison has said there would be no special rules" for the Serbian, and if he failed to provide sufficient evidence to support his medical exemption the 20-time Grand Slam champion will be on the next plane home". Djokovic has refused to reveal his Covid vaccine status and has been an outspoken opponent of vaccination for the coronavirus.