Dubai | Vekic stuns Sabalenka as Swiatek sees off Stephens
World No 2 Aryna Sabalenka returned to the WTA Tour after winning her second Australian Open title, and suffered an ignominious defeat at the hands of Donna Vekic in the opening round of the Dubai Duty Free Tennis Championships on Tuesday, but top-seeded Iga Swiatek passed the stern test set by Sloan Stephens to advance…