FILE - In this Jan. 28, 2020, file photo, Tennys Sandgren of the U.S. reacts after losing a point to Switzerland's Roger Federer during their quarterfinal match at the Australian Open tennis championship in Melbourne, Australia. (AP Photo/Lee Jin-man, File)Tennys Sandgren forced an early clarification of the COVID-19 rules as the first of 15 charter flights began flying Down Under to deliver players for the Australian Open. The two-time Australian Open quarterfinalist was given a special clearance to board one of the flights from Los Angeles to Melbourne despite testing positive to COVID-19 in November and again on Monday. Upon completion of that review he was cleared to fly.”The Australian Open has already been delayed three weeks because restrictions in place for the COVID-19 pandemic, and is set to open on Feb. 8. The women qualifiers include two-time Australian Open and Roland Garros doubles champion Timea Babos of Hungary and British player Francesca Jones, who has a rare genetic condition.