MELBOURNE, Jan 16 (Reuters) – Aryna Sabalenka’s off-season featured a string of exhibition matches and the world number one said on Friday they had given her the ideal platform to experiment and refine her game ahead of her push for a third Australian Open title. While the majority of players chose to wind down after a gruelling 11-month campaign, Sabalenka played exhibition matches in Atlanta and New York last month before facing Nick Kyrgios in a controversial