If you have listened to any of Arne Slot's news conferences this season, you will have heard the Liverpool manager refer to 'low blocks'.
The term essentially refers to a team's defensive shape - blocking space close to their own goal. The closer to their goal, the lower the block.
Slot's side - who cruised to the Premier League title last season in his first year in charge - have struggled for fluidity and consistency this term.
And one of the reasons for that, according to the Reds boss, has been their inability to break down sides who defend deep against them.