England were forced to field Ollie Pope as a substitute wicketkeeper in the second innings of the fourth Ashes Test with Australia.

Injuries to Jos Buttler and Jonny Bairstow left both unable to field at the Sydney Cricket Ground as England attempt to avoid a fourth consecutive defeat.

Buttler injured his left index finger while Bairstow scored England's first century of the series with an injured thumb.

He returned to bat in the morning session on day four but was unable to don the gloves, which were instead handed to Pope.

Pope claimed a pair of catches prior to lunch as Australia were reduced to 66-2, a lead of 188 after England were bowled out for 294.

The substitute keeper claimed a third catch in the afternoon session as Marnus Labuschagne was caught behind for 29.

Sam Billings, playing for Sydney Thunder in the Big Bash League, has been called up to England's Test squad.