Venus Williams opened up about her bout with Sjögren’s Syndrome on Thursday's edition of Good Morning America, less than a day after leaving the U.S. Open due to constant fatigue from the condition.

The tennis ace, 31, said the ailment -- which can take up to six years to diagnose -- left her with a number of symptoms leaving her struggling on and off the court.

Venus said she suffered from swollen hands, morphing joints, dry eyes, dry mouth, pain/numbness of the hands, among other symptoms.

Tennis champion Venus Williams abruptly pulled out of the U.S. Open tennis tournament on Wednesday, claiming it was because of an autoimmune disease she has recently been diagnosed with.

“I’m really disappointed to have to withdraw from this year’s U.S. Open,” Williams said in a statement from Flushing Meadows, New York.  She then revealed the shocking news about her medical illness: “I have recently been diagnosed with Sjögren’s Syndrome, an autoimmune disease which is an ongoing medical condition that affects my energy level and causes fatigue and join pain.”

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The 31-year-old is a seven-time Grand Slam champion, but she has struggled with health problems this year.  She has only played four tournaments so far and a viral illness and abdominal injury kept her sidelined most of the year.