Maria Sharapova cited a recurrence of a tendon injury in her left forearm after withdrawing from her opening-round match at Wimbledon while trailing 0-5 to Pauline Parmentier in the third set.
Sharapova, who recently came back from shoulder surgery, battled once more from a set down against Parmentier on Tuesday however demonstrated uncompetitive in the decider.
Explaining her withdrawal in a subsequent news conference, the 2004 Wimbledon champion said: "I've had a history of a tendon in my left forearm flaring up. It happened today in the second set.
"It's very rare that I withdraw from a match in the middle of the match. That certainly means that it's painful, yeah."
Sharapova included: "For me to withdraw … I would prefer not to place anybody in that position. I'm here to play. I would prefer not to be in this agony.
"Next time I come here, I want to feel great. I want to do what I'm meant to be doing at the level I believe I can."
Asked when she plans to return to action, the Russian replied: "I don't know yet. It's kind of a tricky injury. I've had this before.
"I haven't really gotten a really good clarification from anyone that I've seen on what really causes it."
