The Baseline Top 8: Big stars at 19

In St. Petersburg, 19-year-old Alexander Zverev became the first teenage singles ATP title winner since Marin Cilic in 2008. Take a look at what some of the biggest names in tennis accomplished at his age.

1

At 19, the Swiss stunned four-time defending champion Pete Sampras in the fourth round at Wimbledon.

2

The American won the first of his 14 Grand Slams at the US Open at just 19 years of age. He remains the youngest men's winner in tournament history.

3

The six-time Grand Slam champion won his second Wimbledon title the year before turning 20.

4

Still just a teenager, the German had a historic year, winning the coveted Golden Slam: all four majors and Olympic gold.

5

The King of Clay defeated Mariano Puerta at the French Open for his first Grand Slam title.

6

At 19, Martina took home the Wimbledon doubles title with partner Chris Evert. The win marked her first major title as an American citizen. She would end up with 31 doubles majors (on top of 18 in singles).

7

The American won his first ATP Masters 1000 title in Key Biscayne becoming the youngest Key Biscayne champion (Novak Djokovic has held that record since 2007, also winning at 19).

8

The current world No. 1 won his first ATP title in Amersfoort, Netherlands as a spry 19-year-old.