Australian Border Force authorities are investigating two more international players after tennis star Novak Djokovic’s visa was sensationally cancelled upon entry at Melbourne airport, just days before the Australian Open on Jan. 17. Djokovic arrived in Australia on Wednesday night with an exemption to the vaccination rules granted by Tennis Australia and the Victorian government. However, his visa was rejected by the Australian Border Force (ABF). Australian Home Affairs Minister Karen Andrews confirmed that the ABF is conducting further inquiries. “I am aware that there are two individuals currently being investigated by Australian Border Force,” she told Channel Seven. Andrews said that based on her understanding, the entry requirement, rather than the visa, is the issue. “The Border Force has been very clear that he (Djokovic) was not able to meet the requirement to provide the evidence he needed for entry to Australia,” she told the Nine Network earlier. Novak Djokovic’s father, Srdjan …