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
A Welsh town has signed a 'declaration of friendship' with a French town after battling with their ancestors almost seven-hundred years ago.
Variable cloud with some bright spells likely. Staying largely dry although the cloud may be thick enough in places to give light rain.
You've been sending us pictures of your children dressed up for World Book Day.