Alexander Zverev's Battle with Diabetes

Alexander Zverev is a top tennis player who has been managing type 1 diabetes since he was four years old.

He describes his condition as a second match happening at the same time as his tennis games.

Zverev uses an insulin pump to regulate his glucose levels, but he can't wear it during matches.

He has to make small, careful decisions during games to manage his diabetes, like when to take a sip of water or have an energy gel.

Despite his condition, he has won many important titles and is still aiming for a Grand Slam victory.

Zverev also uses routines and preparation to keep his diabetes and tennis performance in check.

He has faced personal challenges off the court but remains focused on his career.