Alexander Zverev: A Grand Slam, an insulin shot, and a landmark victory

On Sunday, Alexander Zverev attained tennis nirvana, joining the league of extraordinary gentlemen before him - Rafael Nadal, Roger Federer and Novak Djokovic - after being crowned the French Open 2026 champion. Visuals of an emotional Zverev clutching the silver Coupe des Mousquetaires or the Musketeers’ Trophy flooded social media timelines as he became the first German men’s singles champion at Roland Garros in the Open era.This was not the only feat he achieved that evening.The 29-year-old Zverev also became the first person with Type 1 Diabetes (T1D), an autoimmune condition in which the pancreas produces little to no insulin, to win a Men’s Grand Slam. During the four-hour-long gruelling final against Flavio Cobolli, the German openly checked his glucose levels and injected insulin on a changeover. But that did not slow him down as he pushed himself, fighting a battle of nerves and grit against the 24-year-old Cobolli.For Zverev, who was diagnosed with T1D at the age of 4, the trek to the Grand Slam has not been easy. He has had to go through a bunch of hoops, pushing himself physically and mentally, to overcome the condition.But how difficult is it to live a normal life with T1 diabetes?Kolkata-based Dr Amarta Choudhury, Senior Consultant, Endocrinology & Diabetes, The Mission Hospital, Durgapur, doffs his hat at Zverev, calling him “an excellent example” of people with T1D being able to overcome challenges and achieve success in any field including elite sports, if managed properly.“T1D is not a barrier to a normal and productive life. Appropriate and life-long insulin therapy through multiple daily injections or insulin pumps, automated insulin delivery systems can ensure regular life is not hampered,” he says.Dr Saroj Dubey, Gastroenterologist, Kailash Hospital, Noida, lauds Zverev for playing two battles - on court and away from it - and calls his journey one of “inspiration, resilience and hope for millions” who may be suffering from diabetes or any other chronic disease from an early age. “For those diagnosed with T1D and playing competitive sport (like famous Pakistani cricketer Wasim Akram), the main precautions include constantly monitoring sugar levels (during practice and matches) and to time the insulin levels accordingly. Adherence to a strict diet is non-negotiable,” the medico author says.Zverev’s on-court landmark performance made for good visuals as the 6’6” player served, saved and swung his racquet to ace the game. For those watching Sunday's encounter, few could gather the inner volatility going on in the champion’s physical form.Karan Sarin, metabolic health coach and author of “Sick Nation: Inside India’s Lifestyle Disease Epidemic and How To Fix It”, says it is natural for many to assume that intense physical exercise naturally lowers blood sugar; but in elite, high-stakes competition, the opposite can occur.“When Zverev steps onto the court, the physical and psychological stress triggers a massive 'fight-or-flight' hormonal surge, flooding his system with adrenaline and cortisol. These counter-regulatory hormones act as an ancient survival mechanism, signaling his body to release immediate energy. This triggers a massive glucose dump from the liver, which rapidly breaks down stored glycogen and releases sugar into the bloodstream at a pace far exceeding what his muscles can burn,” the creator of @sweetreactions, a popular Instagram community, says. In India, nearly 990,000 people live with T1D, and this large number is partly due to its enormous population. “Even if the incidence rate is not the highest globally, the absolute number of affected children and young adults becomes very large,” Dr Chowdhury adds.According to an ICMR-INDIAB study, the estimated number of individuals with diabetes in India was 32 million in the year 2000, which rose to 63 million by 2012, 74 million in 2021, and is now 101 million.Increased affluence, decreased physical activity, high-calorie foods, genetic susceptibility have been key contributors. Dr Chowdhury adds environmental triggers as well.“Environmental triggers including viral infections can predispose to development of T1D. Viruses do not usually cause Type 1 diabetes by themselves. In genetically susceptible individuals, certain viral infections (like enterovirus, rotavirus) may trigger or accelerate an autoimmune process that ultimately destroys the insulin producing pancreatic β-cell leading to T1D,” he says.For young folks wanting to pursue a career in professional sports, the T1D challenge can be overcome, with proper care and caution. Primary precautions include frequent glucose monitoring before, during, and after training, and insulin dose adjustments around exercise. “It's important that people with diabetes carry glucose tablets or glucose water during exercise or sports activities to treat hypoglycemia if needed. 15 to 20 grams of glucose should be consumed immediately if blood glucose is less than 70 mg/dL,” Dr Chowdhury says.Zverev’s victory elevated him, rendering him a milestone moment. For millions living with T1D in India, it may prove to be an inspiration of sorts, lending hope that a condition can shape a life, but it does not have to define it.