Operating consistently at the elite level means that, for football clubs, you have to accept losing your players from time to time as they swap their club colours for international ones.
This, of course, happens at regular intervals throughout the year, both during the season and after it, as countries face off in friendlies, in qualifiers and at international tournaments.
And with Liverpool dining at the top table of European football, it means a whole host of their players head off every four years to represent their respective national teams at the biggest competition of them all — the World Cup.
Since the 2002 edition of the tournament, co-hosted by Japan and Korea, at least six players have represented their countries every four years on the biggest stage of all while being contracted to the Reds.
There are 39 answers on the quiz below — 34 different players feature, though three of them played at two World Cups while they were a Liverpool player, and one played at three tournaments.
This list only includes players who made an appearance at a World Cup finals competition. For example, Simon Mignolet was part of the Belgium squad for the 2014 and 2018 editions of the tournament, but didn’t play. Therefore, he is not a correct answer.
So how many of the correct ones can you get? You have six minutes to get all 34 — good luck, and don’t forget to send us your scores! Tweet them to us @TheKopiteOFF.