Ajax are the youngest team remaining with Frenkie de Jong and Matthijs de Ligt (circled) playing crucial roles

Ajax

Barca

Liverpool

Spurs

20 years of age

22

24

Median age

26

28

30

32

34

20 years

of age

22

24

26

28

30

32

34

Median age

Ajax

Barcelona

Liverpool

Tottenham

20 years

of age

22

24

26

28

30

32

34

Median age

Ajax

Barcelona

Liverpool

Tottenham

Source: Transfermarkt.com. Note: size of circle denotes playing time in the 2018-19 Champions League