Wales' Mark Williams has gone to hospital after the opening session of his latest World Snooker Championship match.
The 44-year-old played the first eight frames of his second round clash with David Gilbert in Sheffield but went straight to hospital following the conclusion of the session on Friday after suffering with chest pains.
Williams took to his official Twitter page to confirm the news.
The Welshman tweeted: "A&E. Could be here a while, couldn’t stick the chest pains no more.
"Lucky there wasn’t any more frames to play. #bettergetcheckedoutsafethansorry. (sic)"
People are loving the crazy antics of Mark Williams and his wife in Dubai
Williams issued a further update on social media late on Friday night.
On Twitter, he wrote: "Doctors are confident it’s not anything to do with my heart. Awaiting more tests at 10 o clock."
Fans were quick to send their best wishes to the three-time world champion on social media.
It's understood Williams was advised by a doctor to go to hospital at the end of the first session of his second round encounter with Gilbert after he revealed he had been feeling unwell.
The Welshman is aiming to defend the title he won in stunning fashion at the Crucible last year.
Williams - who trails Gilbert 5-3 in his round two match - beat Englishman Martin Gould 10-7 in the opening round of the competition.
