World number one Novak Djokovic's new calendar year hasn't begun on the right note. The Serbian landed in Melbourne last week to take part in the Australian Open along with a medical exemption for Covid-19 vaccination, from the Victorian government. However, his visa wasn't cleared and his exemption was tarnished by the authorities at the airport as the 34-year-old was send to a detention centre, i.e. an immigration hotel in Melbourne, for four days.