Alexander Zverev at Wimbledon: Playing Tennis with Type 1 Diabetes (ELI5 Style)

The Big Match and a Hidden Challenge

On Sunday, Alexander Zverev (a 29‑year‑old tennis player from Germany) will play in the Wimbledon final—one of the biggest tennis tournaments in the world. He has two tough things to face:

• Jannik Sinner, the defending Wimbledon champion, who is his opponent.
• Type 1 diabetes, a health condition that Zverev must manage every single day, even while playing.

Zverev just won the French Open (another huge tournament) and is trying to win two giant titles in a row (called back‑to‑back Grand Slam titles). But his diabetes means he has to keep a close eye on his body’s sugar levels and sometimes give himself medicine with a tiny needle during matches.

Important Point: Type 1 diabetes means the body can’t make a special helper called insulin. Without insulin, the body’s cells can’t get the sugar they need for energy, so the sugar builds up in the blood and makes a person sick. Zverev must manage this carefully.

Zverev’s Diabetes Story: Since He Was a Little Kid

• Zverev was diagnosed with Type 1 diabetes at only age 4.
• For many years he kept it a secret. If he needed an insulin shot during a match, he would do it quietly in a bathroom break.
• In 2022, he told everyone about his diabetes. At the same time, he started a foundation (a kind of charity) to help children with the condition.
• He said: “If we as a foundation, and me just as a tennis player and somebody who has diabetes, can help even just a single kid or a single parent, I’ll be the happiest person in the world.” He wants people to see that diabetes shouldn’t put limits on what you can do.

How He Handles Diabetes on the Court

Because his body doesn’t make insulin, Zverev uses an insulin pen (a small device that gives a tiny shot) to put insulin into the top of his thigh during the short breaks in a match (these breaks are called changeovers).

He also wears a glucose sensor—think of it as a tiny watchdog stuck under the skin that checks his sugar levels all the time. The sensor sends the numbers to his phone, so he doesn’t have to prick his finger with a needle to test blood.

• Usually, players are not allowed to have phones on the court.
• But the people who run Wimbledon and other big tournaments (the All England Club confirmed this) gave Zverev special permission to keep his phone with him just to check his sugar.

Here are the simple steps Zverev follows during a match:

1. His sensor measures his blood sugar and sends the number to his phone.
2. During a changeover, he looks at the reading.
3. If the sugar is too high, he uses his insulin pen to give himself a small shot in the thigh.
4. He goes back to playing, staying safe and energized.

A Scary Mix‑Up with the Sugar Sensor

Before Wimbledon, at a warm‑up event in Halle, Germany, something went wrong:

• His glucose sensor gave a wrong reading, showing his sugar was too high when it wasn’t.
• Because of that false alarm, he accidentally injected too much insulin before his semifinal match against Taylor Fritz.
• To fix the problem, he had to eat 350 grams of sugar through special glucose gels (like sticky energy paste) in the first hour of the match to bring his levels back to normal.
• He said he felt “awful” and ended up losing that match in three sets.

He told reporters before Wimbledon that the company that makes the sensor is investigating. He had used the sensor for over 10 years, and this was the first time such a mistake happened. Even with the scare, he calls the sensors “life changing.”

Callout: Zverev reminds us that even though his sensor slipped up that day, the device makes life much easier for millions of diabetics. It’s like a helpful robot that usually works perfectly and keeps people safe.

Other Famous Athletes with Type 1 Diabetes

Zverev is not alone—many top sports stars have the same condition:

• Bobby Clarke (NHL Hall of Famer) played his entire hockey career with Type 1 diabetes.
• Max Domi (current NHL player) also has it.
• Mark Andrews (Baltimore Ravens tight end in American football) frequently checks his blood sugar during games.
• Jay Cutler (former NFL quarterback) was diagnosed in his mid‑20s.
• Gary Hall Jr. (Olympic champion swimmer) was also diagnosed as a young adult.

Visibility matters! A year ago, Mattel made its first Barbie doll with Type 1 diabetes. She wears a continuous glucose monitor (the same kind of sensor Zverev uses) on her arm and holds a phone showing the matching app.

What Is Type 1 Diabetes? (ELI5)

Imagine your body is a house and sugar is the food energy your cells need. Normally, a key called insulin opens the door so sugar can go inside. With Type 1 diabetes:

• The body’s “key factory” (called the pancreas) stops making insulin or makes almost none.
• Without the key, sugar stays outside in the blood and piles up.
• So, people must give themselves insulin shots to open the door and keep cells fed.

Some quick facts:

• It used to be called “juvenile diabetes” because it most often shows up in children and teenagers.
• About 9.2 million people worldwide have Type 1 diabetes (according to the International Diabetes Federation).
• The U.S. CDC explains that insulin shots are required to manage blood sugar so it doesn’t build up dangerously.

Summary

Alexander Zverev is a top German tennis player getting ready for the Wimbledon final against defending champion Jannik Sinner. He also lives with Type 1 diabetes since age 4, using an insulin pen and a glucose sensor (with special phone permission) to stay healthy during matches. He shared his condition in 2022 to help kids through his foundation. Recently, a sensor error caused him to take too much insulin, but he recovered and still praises the technology. Many other athletes—and even a Barbie—show that diabetes doesn’t have to limit big dreams. Type 1 diabetes means the body lacks insulin, a key for sugar, and needs daily management with shots.

(Original report from AP Tennis: https://apnews.com/hub/tennis)

FAQ

Q1: What is Type 1 diabetes in simple words?
A: It’s a condition where your body can’t make insulin, a special key that lets sugar (energy) into your cells. Without it, sugar builds up in blood, so you need insulin shots to stay healthy.

Q2: How does Zverev check his blood sugar during a match?
A: He wears a small sensor under his skin that sends sugar readings to his phone. Tournament officials let him use his phone on court just for this reason, so he avoids finger pricks.

Q3: Did Zverev ever have a problem with his sensor?
A: Yes, at a warm‑up event in Halle, the sensor gave a false high reading, causing him to inject too much insulin. He ate lots of sugar gels to recover but lost that match.

Q4: Can kids with diabetes play sports like Zverev?
A: Absolutely! Zverev, along with many other pro athletes (and even a Barbie doll), shows that with proper management, diabetes shouldn’t set limits on activity or dreams.

Q5: Why did Zverev talk about his diabetes in 2022?
A: He wanted to help children and parents by launching a foundation, showing that having diabetes doesn’t mean you can’t achieve big goals like winning Grand Slams.