South Wales Police says missing Ben Thompson from Haverfordwest had been enjoying the rugby international in Cardiff on Saturday.
The 34-year-old was last seen in Cardiff city centre on Saturday.
He is described as 5' 9" tall, with short brown hair and blue eyes, and he was last seen wearing brown boots, blue jeans, and possibly a blue & a white striped top with a green jacket.
Anyone with information is asked to call their local police on 101.
More top news
The family of an elderly woman from Swansea have been trying to sell her house to pay for her care.
Welshman Nathan Cleverly will face Tony Bellew in Liverpool on the 22nd of November. It's three years since their last fight
It will become dry in the evening. Northern and central parts will become mostly clear and cold, with fog patches.