MELBOURNE, Australia — “I think it had a mind of its own,” Emma Raducanu said of her boom-and-bust serve during Tuesday’s gritty win over No. 26 seed Ekaterina Alexandrova at the Australian Open. Raducanu hit 15 double faults and nine aces in a 7-6(4), 7-6(2) victory. Her first serve was lethal at times, but Raducanu won just 30 percent of her second-serve points. This was Raducanu’s first match of 2025 after a back spasm disrupted her pre-season. It was also the debut for what appeared to be a