Lorenzo Musetti’s man bun is a thing of the past: The Italian tennis player showed up at the Australian Open with his famously lengthy locks sheared, and he wound up winning his first-round match Tuesday by, um, a hair. The 16th-seeded Musetti, a Wimbledon semifinalist last July and Paris Olympics bronze medalist last August, needed 4 hours, 6 minutes to get past countryman Matteo Arnaldi 7-6 (4), 4-6, 7-6 (5), 6-3 at Melbourne Park. Gone were the strands that dangled nearly to his shoulders under a backward white hat at the All England Club and, as recently as late November, at the Davis Cup Finals, which Italy won.