MELBOURNE--Aryna Sabalenka continued to be an irrepressible force at the Australian Open as she powered to a 6-3 6-2 victory over Chinese 12th seed Zheng Qinwen on Saturday to successfully defend her title and add a second Grand Slam trophy to her cabinet. The Belarusian second seed has barely put a foot wrong at what has turned into her happiest hunting ground as she became the first woman to retain the Melbourne Park crown since compatriot Victoria Azarenka in 2013. "It's been an amazing couple of weeks and I couldn't imagine myself lifting this trophy one more time," Sabalenka said. READ: Aryna Sabalenka set to become new No. 1, tipped to win US Open "I want to congratulat...Keep on reading: Sabalenka overpowers Zheng to retain Australian Open crown