Every season there's pressure on clubs throughout Europe's best leagues to offer young players a chance at the highest level.
Here's a list of the 20 teenagers with the most first-team minutes across the top five leagues on the continent.
20. Ozan Kabak - VfB Stuttgart
Justin Kluivert - AS Roma
It's not been an easy transition for Patrick Kluivert's son, swapping the Eredivisie for one of Europe's top five leagues, but 19-year-old Justin has still made 27 appearances across all competitions this season.
First-Team Minutes: 1118
18. Rafael Leão - LOSC Lille
Rafael Leão's future was up in the air at the start of the season as he pushed for a move away from Sporting CP, but the Portuguese star has settled in France and is one now among the most exciting talents in Ligue 1.
First-Team Minutes: 1177
17. Samuel Chukwueze - Villarreal CF
But Nigeria international Samuel Chukwueze has been a shining light off the bench for them this season, and Villarreal remain unbeaten in games the teenager has scored or assisted in.
First-Team Minutes: 1199
16. Dwight McNeil - Burnley
There's not been a huge amount to shout about for Burnley fans this season as they prepare for another mid-table finish in the Premier League, but breakout star Dwight McNeil has given the club a huge lift throughout the campaign.
First-Team Minutes: 1243
15. Andrea Pinamonti - Frosinone Calcio
Getting his first real taste of senior football this season, Andrea Pinamonti has taken the bull by the horns with relegation candidates Frosinone Calcio.
The centre-forward has made 19 appearances on loan from parent club Inter, scoring against the likes of Fiorentina and AS Roma.
First-Team Minutes: 1244
14. Dan-Axel Zagadou - Borussia Dortmund
First-Team Minutes: 1254
13. Alessandro Bastoni - Parma
First-Team Minutes: 1313
12. Nicolò Zaniolo - AS Roma
First-Team Minutes: 1408
11. Benoît Badiashile - AS Monaco
Monaco's 18-year-old centre-back
First-Team Minutes: 1493
Hamed Junior Traorè - Empoli
Empoli are still staring relegation in the face as it starts to get into the business end of the season, but the performances of teenager
First-Team Minutes: 1641
9. Ryan Sessegnon - Fulham
Ryan Sessegnon has been at the centre of media attention ever since his first-team debut in 2016, and he looks set to finally secure the big money move that he's been waiting for at the end of the season following Fulham's
First-Team Minutes: 1866
8. Mattéo Guendouzi - Arsenal
Mattéo Guendouzi only ever made 30 appearances with former club Lorient, but the 19-year-old has already established himself as a key first-team player under Unai Emery at Arsenal.
First-Team Minutes: 1869
Boubacar Kamara - Olympique de Marseille
First-Team Minutes: 1869
6. Cucho Hernández - SD Huesca
First-Team Minutes: 1960
Ibrahima Konaté - RB Leipzig
First-Team Minutes: 1980
4. Jadon Sancho - Borussia Dortmund
First-Team Minutes: 1984
3. Pedro Porro - Girona
First-Team Minutes: 1993
2. Evan N'Dicka - Eintracht Frankfurt
First-Team Minutes: 2202
1. Kai Havertz - Bayer Leverkusen
First-Team Minutes: 2362