Best Under-21 XI in the world right now

Fullbacks: Trent Alexander-Arnold (Liverpool) and Kieran Tierney (Celtic)

Alexander-Arnold is part of England's World Cup squad

The 2017/18 season has been an amazing one for young Trent Alexander-Arnold. Ahead of the start of the season, he signed a new contract with Liverpool less than a year after signing one previously.

He scored a sensation free-kick on his European debut for Liverpool and then things just got better and better for him. His best performance so far was against Manchester City in the quarter-final of the Champions League when he kept the dangerous Leroy Sane at bay despite City’s attempt to target his inexperience.

Arnold has already played 45 games for Liverpool and his form at club level earned him a call-up to the England squad for the World Cup as the only uncapped outfield player.

Trent was also named Liverpool’s Young Player of the Year in 2016/17 and 2017/18.

Tierney has been linked with a move to the Premier League

The left-back position is taken up by Kieran Tierney of Celtic. The young Scott is one of Celtic’s and Scotland’s best players.

He came through Celtic’s academy, made his debut for the first team in April 2015 and still plays for the club. He has now played 130 games for the Scottish giants winning six trophies including three league titles.

The 21-year-old is an attacking fullback and ended the 2017/18 season with 4 goals and 10 assists in all competitions.

Honourable mentions: Benjamin Henrichs (Bayer Leverkusen) and Nico Elvedi (Borussia Monchengladbach)