Dominic thiem announces sad news

I'm not aware of any recent sad news announced by Dominic Thiem. Dominic Thiem is an Austrian professional tennis player who has been active on the ATP Tour since 2011. He has had a successful career, winning several titles including the 2020 French Open and reaching a career-high ranking of world No. 3.

If you're referring to a specific incident or news article, could you please provide more context or information so I can better understand what you're referring to? I'll do my best to help.