 The Australian cricket team toured England in 1930 . Australia won the five @-@ Test series 2 – 1 , with Don Bradman scoring <unk> runs at a batting average of 139 @.@ 14 , an aggregate record that still stands . By the time of the next Ashes series of 1932 – 33 , Bradman 's average <unk> around 100 , approximately twice that of all other world @-@ class batsmen . England feared that without <unk> to drastic tactics , they might not be able to defeat Australia until Bradman — then aged 24 — retired , something that might be over a decade away . It was believed that something new was required to combat Bradman , but it was believed more likely that Bradman could be dismissed by leg @-@ spin as Walter <unk> and Ian <unk> had supposedly caused him problems ; two leg @-@ spinners were included in the English touring party of 1932 – 33 . This view gradually came to change leading up to 1932 . 
