Maria Sharapova St Petersburg has been eliminated from the Ladies Trophy in his second round as a result of serious injuries to the shoulders.
Sharapova, 31, Daria Kasatkina played third seed on Thursday (AEDT), but gave his opponent a walkover. The Russian world has struggled with no.29 shoulder injuries in recent years.
"I had an effort to be ready to compete this week, but my right shoulder remains a problem for me," said Sharapova in a statement.
"The next few days I will meet with a medical team to assess the situation, and I hope to finish as soon as possible.
"It was very special to play in front of my home fans this week and I continued to compete in this wonderful race."
Sharapova had the first appearance in the championship. He won the Australian Daria Gavrilova in the first round in more than a decade.
Sharapova is in the middle of a form of milk. The final leg of his final match means that he has not done the quarterfinals of the French Open in the previous or final position. The five-year-old Grand Slam winner lost to Australian Aussie Star Ashleigh Barty in fourth round.