India's highest-ranked tennis player Prajnesh Gunneswaran started his preparation for the 2020 Australian Open on a positive note as he defeated Australia's Jason Kubler to advance to the second round of the Canberra Challenger in Bendigo, Australia on Monday. Playing his first tournament of 2020, the 30-year-old Indian cruised to a straight sets 7-5, 6-3 victory against the 26-year-old Australian. …