The Principality Stadium roof will be partly open for today's game between Wales and Australia. It's due to a mechanical fault and comes on a day there is Met Office weather warning in place for rain in Cardiff.
A statement from the Welsh Rugby Union said: "The computer software which controls the roof mechanism has encountered a mechanical fault which could take several hours to repair and therefore cannot be resolved before kick-off. For the reason, the roof will remain with its current three-metre gap for this afternoon's match."
The retractable stadium roof has been fully closed for Wales' first three autumn Tests against New Zealand, Argentina and Georgia.
