Young Russian tennis ace Violetta Degtiareva has died at the age of 23.

The athlete reportedly suffered heart failure during a training session last week (12Jan15).

Fellow tennis player Anastasia Vdovenco broke the news to fans via Facebook.com on Wednesday (21Jan15), writing, "I can hardly believe it. Rest in peace."

Degtiareva was recently ranked 1,086th in the world.