It is no surprise that the former No. 1 junior picked up tennis as a child considering his mother is a tennis coach, his father, Alexander Zverev is a former professional player and a tennis coach as well, and his older brother, Mischa, is also a professional tennis player. In his junior career, he won the 2014 Australian Open juniors single title and was runner-up at Roland Garros juniors in 2013. In 2014, he achieved his first ATP Challenger Tour title and first win against a player ranked within the top 100 when he beat No. 87 Tobias Kamke in the first round of the Sparkassen Open in Braunschweig. He then went on to defeat No. 56 Andrew Golubev in the semifinal and No. 89 Paul-Henri Mathieu in the final. His first win over a top 20 player came at the 2014 International German Open when he defeated No. 19 Mikhail Youzhny. In 2015, Zverev moved into the top 100 for the first time after defeating No. 85 Jan-Lennard Struff at Heilbronn in Germany. Zverev's father is his current coach.