World No.2-ranked Aryna Sabalenka has lost another first-round match at an Australian Open tune-up tournament to a much lower-ranked opponent. Sabalenka lost 5-7, 6-1, 7-5 to Sweden’s Rebecca Peterson, who came into the match at the Adelaide International ranked No. 395. Last week in the opening round of the first Adelaide International tournament, Sabalenka lost…