PARIS (AP) — It all used to come so easily for Dominic Thiem on a tennis court — his powerful forehand, his elegant backhand, his hit-which-shot-when calculations, all fine-tuned to the point of a title at the U.S. Open and three other Grand Slam final appearances, including two at Roland Garros. Nowadays, even though the pain from last year's torn tendon in his right wrist is no longer there, the strokes and, most disconcertingly, the wherewithal, are not what they once were, to the extent that his first-round exit at the French Open on Sunday was his 10th consecutive loss. The situation has become dire enough that Thiem, a 28-year-old Austrian once ranked No.