Siddle out of second Test v New Zealand

The 31-year-old struggled with back spasms during the series opener in Wellington as the tourists took a 1-0 series lead thanks to a victory by an innings and 52 runs.

Siddle was unable to bowl on the fourth and final day and finished with match figures of 3-67 in Australia's comprehensive win.

"Peter experienced some discomfort in his back during the first Test in Wellington and has not recovered sufficiently enough to play the Test," Cricket Australia (CA) physiotherapist David Beakley said.

"At this stage the plan is for him to stay with the squad in Christchurch for the remainder of the tour before returning to Melbourne for further investigation."

Siddle is likely to be replaced by fellow Victorian James Pattinson for the second and final Test, which starts on Saturday.