Forward Quote by Danilo Gallinari

I started playing professionally when I was 17 years old.

— Jonas Valanciunas

When I was about 16, I started to believe I could play professionally. I worked hard and focused more.

— Marouane Fellaini

I started full-time training when I was 10, signed professionally when I was 14, and won my first match at the same age.

— Madison Keys

I could have started playing professional at 16, 17 quite easily. For my position, I was far better than a lot of people around…

— Sol Campbell

It wasn't until I was about 16 that I began to grow and develop as a player.

— Jaap Stam

I was in 30-plus clubs when I was 14 years old.

— T-Pain

I played in the Under 18s when I was 14, then the reserves at 15, and then the first team.

— Jack Rodwell

I started playing when I was about 16, and I got picked for the England youth team when I was 17 because I was…

— Fallon Sherrock

I was nineteen when I signed and then worked with three managers and just didn't play that much.

— Kevin De Bruyne

I got into pro ball at 18 and played until I was almost 39, non-stop.

— Ryne Sandberg

When I was a kid in Dronten, I played my first games when I was five-years-old and within one season a bigger club approached…

— Hakim Ziyech

I was maybe only 13 or 14 when I started to play junior tournaments.

— Jana Novotna