There is a proven track record of improving players
Klopp has a history of taking youngsters and making them much better players. Not only at Anfield, but also at Borussia Dortmund.
Once Wenger held this crown. He developed some fine footballers and his youth policy was the envy of many, but no more.
Now that title must surely belong to Klopp, who has overseen some rapid improvements with the Reds own ranks.
Next: This is the FA Cup back four we want against Everton
Joe Gomez, Trent Alexander-Arnold, Roberto Firmino, Sadio Mane and even Alex Olxade-Chamberlain can speak to that. For Lemar, the choice should be clear.