The British and Irish Lions have suffered a massive setback after influential lock Paul O'Connell was ruled out of the rest of the tour.
O'Connell, who was the 2009 tour captain, suffered a fractured arm in the 23-21 victory over Australia in the first Test in Brisbane.
And a scan on the injury has now revealed the extent of the injury, with O'Connell's tour now over.
It is a cruel blow for O'Connell, who had fought his way back from two serious injuries to make the tour.
A statement on the Lions website read: "British & Irish Lions lock Paul O'Connell has been ruled out of the remaining two games of the series against the Qantas Wallabies after suffering a fractured arm."
Parling replaces O'Connell for the second Test after he was withdrawn from the midweek team to face the Rebels.
Parling, who came off the bench for the first Test victory, had been due to captain the Lions against the Rebels but Ian Evans now takes his place in the starting XV.
Dan Lydiate will skipper the Lions, while Tom Croft fills the place vacated by Evans on the bench.
The loss of O'Connell is the latest injury blow for the Lions following the success in Brisbane with Ireland prop Tom Court teaming up with the squad as cover for Alex Corbisiero.
The England international, who only joined with the tour himself after Cian Healy was injured, suffered a calf strain and is currently undergoing treatment.
Mako Vunipola is on standby to replace his compatriot, having come off the bench for Corbisiero at the Suncorp Stadium.