Very little is known about the nature or extent of Owen Williams' injury, sustained whilst playing for Cardiff Blues against Asia Pacific Dragons in the World Club 10s on Sunday.
The Blues released a statement yesterday, saying: "Owen Williams is to remain in hospital in Singapore after sustaining an injury at the World Club 10s. Cardiff Blues will issue further updates when they are available."
Blues teammate Macauley Cook also tweeted yesterday to say he was at the hospital with Williams, waiting for his family to arrive.
The WRU said 22-year-old Williams has not travelled home with the rest of the Blues squad.
More top news
RSPCA Cymru says it's worried about a rise in reports of pets being poisoned. Here's the charity's advice on how to keep your animals safe.
Brian, 85, and Shirley, 80, plan to pose side by side on the church steps to recreate their cherished black and white wedding photo.
A slight taste of summer today, but not too much! If you are making outdoors plans for the weekend, my advice is to make them for Sunday.