Key keywords: Matteo Arnaldi, ATP Tour withdrawal, 2024 Barcelona Open, overnight vomiting episode, professional tennis health, gastrointestinal illness, clay season preparation, tennis player medical absence Professional tennis rising star Matteo Arnaldi has officially withdrawn from the 2024 ATP 500 Barcelona Open, tournament organizers confirmed on Tuesday, after the 23-year-old Italian suffered a full night of uncontrollable vomiting that left him too weak to compete. Arnaldi, who was seeded 14th in the Barcelona men’s singles draw, was scheduled to face qualifying entrant Hugo Grenier in the first round of night session play on Tuesday. His team released an official statement hours before the scheduled match time clarifying the circumstances of his withdrawal: Arnaldi had completed a two-hour on-court training session on Monday afternoon with no reported symptoms, and had eaten a standard pre-tournament meal prepared by his personal chef before resting in his hotel room. At roughly 10:15 PM local time, he began experiencing severe abdominal cramping and repeated vomiting that persisted for nearly seven hours. On-site tournament medics were called to his hotel just after 2 AM, and administered initial treatment to reduce nausea and prevent dehydration. Testing ruled out food poisoning, with medics concluding Arnaldi had likely contracted the highly contagious norovirus that has been circulating across northern Spain in recent weeks. After evaluating his condition on Tuesday morning, medical staff explicitly advised against Arnaldi attempting to compete, noting that even mild physical exertion could worsen his symptoms and lead to severe dehydration that would sideline him for weeks rather than days. The withdrawal comes as a major blow to Arnaldi’s 2024 clay season momentum: he broke into the ATP top 40 for the first time last month after reaching the fourth round of the Monte-Carlo Masters, and had identified Barcelona as a key warm-up event ahead of the French Open next month. Arnaldi posted a short update to his personal Instagram account on Tuesday afternoon, writing "I’m heartbroken to miss the Barcelona Open, a tournament I’ve dreamed of playing since I was a kid. I’m already resting and following my doctors’ orders, and I’ll do everything I can to get back on court as soon as possible. Thank you to all the fans for your support and kind messages." Tournament organizers have adjusted the Tuesday night session schedule to replace Arnaldi’s match with a second-round men’s doubles fixture, and have increased sanitization protocols across all player-only areas to reduce the risk of further viral spread among competing athletes.