With Alexander Zverev and Nick Kyrgios having already established themselves as two of the most promising youngsters in the game today, there have been many others who are creating great strides with their performances on the ATP circuit.
The Next-Gen Finals in Milan in November will see the top young guns compete amongst themselves in a new and exciting format.
The tournament will also be the perfect stepping stone for a few of these youngsters who are looking to make a name for themselves.
In this article, we take a look at the top five players in the world under the age of 20.
#5 Félix Auger-Aliassime
Despite Canada's no. 1 Milos Raonic struggling with injuries, it looks like Canada's future is in safe hands. Just a few months ago, Denis Shapovalov made headlines with his performances in the US Open and the tournaments leading up to it.
While he did so, another teenager's performances in the Challenger circuits went unnoticed.
Felix Auger-Aliassime, the 17-year-old, became the youngest player ever to win a Challenger title when he did so at the Open Sopra Steria de Lyon in June 2017. He followed that up with another title at the Copa Sevilla and achieved a career-high ranking.
The 2016 US Open junior champion is currently 19th in the race to qualify for the Next-Gen finals. He might almost be out of contention to do so but has surely got a lot of people talking about his performances.