Spanish superstar Rafael Nadal on Sunday pulled out of the Australian Open with a "micro tear on a muscle" barely a week after making his comeback from a year-long injury absence, but said he remained positive. The 37-year-old had been out of the game since injuring his hip at the 2023 Australian Open, undergoing surgery before making his return at the Brisbane International. Nadal won his opening two matches in straight sets and looked in good touch, but needed a medical timeout towards the end of his quarterfinal loss to Australia's Jordan Thompson after feeling pain in his upper left thigh. "During my last match in Brisbane I had a small problem on a muscle that as you kn...Keep on reading: Nadal pulls out of Australian Open with muscle tear