34-year-old will be oldest woman to make debut in rankings top 100 Australia No 1 returns after being denied Australian Open wildcard Australian No 1 Arina Rodionova has made tennis history by becoming the oldest woman to make a first appearance in the world's top 100. The 34-year-old climbed to a career-high ranking when she beat Chinese prospect Bai Zhuoxuan 3-6 6-1 6-0 in the Thailand Open in Hua Hin on Thursday night.