Christian's move from New South Wales to South Australia paid off well before he was elevated to Australia's Twenty20 squad in 2009-10. Christian was surprisingly not offered a contract with the Blues for 2007-08 after playing every FR Cup and Twenty20 match the season before, but the Redbacks were quick to snap him up after Rod Marsh made a phone call. The switch has been a huge success, beginning when he played four first-class matches and impressed in the one-day arena with an average of 44.66 and a high score of 94. The following summer Christian's fast-medium bowling proved valuable and he was South Australia's second top Sheffield Shield wicket taker with 27 at 26.14.