Tennis great Serena Williams is recovering from surgery to remove a large cyst on her neck. Williams, 43, posted the news to social media on Wednesday, saying she had a benign branchial cyst "the size of a small grapefruit" removed. She ended the note accompanying a photo of her in a hospital bed with the message "all is OK." Williams, who won 73 WTA Tour titles and nearly $100 million during her career, said she discovered a lump on her neck in May and doctors told her that surgery to remove