The history of tactical instructions from the bench is long and varied, from managers screaming for 90 minutes to those who sensibly choose to merely sit and glare at their players.
On Wednesday night a new situation was seen as Daniel Sturridge had to chase his team-mates with a note handed to him by Jurgen Klopp.
Sportsmail has put together a tongue-in-cheek guide to managers handing over notes and instructions in general.
What happened with Daniel Sturridge on Wednesday night?