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.
Daniel Sturridge was handed a note by the Liverpool bench on Wednesday in the EFL Cup
What happened with Daniel Sturridge on Wednesday night?
Sturridge was handed a note with instructions by Klopp as Liverpool chased a draw against Southampton in their EFL Cup semi-final. That led to a farcical situation whereby the forward was attempting to play and instruct at the same time.
Publically, Jurgen Klopp has called it his own fault, an attempt to switch to a 3-5-2 formation at a point when he expected a substitution to take longer than it did.
But what few know is that it was actually Klopp’s greatest innovation yet - the inverted false manager, or as it is known in Germany, eine Falscheinvertiertrainer. It’s meant to allow a player to argue with the fourth official at all times while simultaneously heading and kicking every ball.
Expect other managers to follow suit. Word is that Chelsea boss Antonio Conte has already come up with his own version, the backwards data analyst. Victor Moses has been earmarked for the role.
The game kicked off before Sturridge could relay the message, leaving him running about
Sturridge attempts to interpret the note handed to him by Liverpool manager Jurgen Klopp
How can opposition players stop managers being effective with their instructions?
Like all important revolutions in football, this one was pioneered by Ross Wallace. The Sheffield Wednesday midfielder spotted Huddersfield’s Elias Kachunga reading a note from manager David Wagner and grabbed it off him to have a look.
Unfortunately for Wallace, he did not realise that each manager has their own unique script that allows them to communicate secretly with their players.
Huddersfield Town's Elias Kachunga reads a note handed to him by manager David Wagner
The note is stolen from the Huddersfield forward by Sheffield Wednesday's Ross Wallace
Wallace attempts to read the note handed to Kachunga as he looks for some insight
Few fans know that at least 20 per cent of all training sessions at every football club are dedicated to learning increasingly complex character sets just in case a team is 1-0 down away at Rotherham and a manager wants to send the big defender up front.
Luckily, a combination of strong sources and the acquisition of the piece of paper have allowed Sportsmail to find and translate Wagner’s famous note, which is displayed below.
Sportsmail's interpretation of what the note stolen by midfielder Wallace would have said
Are instructions easy to intercept?
Ask any manager that has signed a foreign star who is unable to speak English and they will tell you that football is a universal language.
That has never been more clear than in the case of Emmanuel Eboue, who once tried to listen in on instructions at the 2010 World Cup when he faced North Korea. In what must have been a shocking moment for the Ivory Coast defender, Eboue suddenly found himself able to speak Korean fluently.
This is why it is always recommended that, no matter how obscure the language, conversations on a football pitch are always carried out behind hands partially obscuring mouths. The alternative is too scary to think about.
North Korea's manager discussing some tactical instructions with one of his players
Defender Emmanuel Eboue pretends to listen in on the instructions being doled out
Eboue and the North Korean player stroll off, with all the secrets of the opposition revealed
What are the most complicated instructions a manager has ever given out?
You might think the answer to this question would involve one of the true tactical masters of the game - Pep Guardiola, Conte, Marcelo Bielsa. And you’d be right, as Tim Sherwood undoubtedly is responsible for the most exceptional tactical alteration ever given out from the touchline.
This may simply look like a manager trying to do something to counter a substitution, but that is to avoid giving Sherwood full credit.
Ever heard of interpretive dance? Well, the masters could learn something from Sherwood, who encouraged his players to take an interpretive attitude towards the game. Admittedly, Brad Guzan’s decision to join the attack that day probably did not go down in football’s greatest decisions, but that is simply the freedom that Sherwood and his instructions allowed.
It's probably worth noting that, even if Guzan did not really joint the attack, Villa went on to lose the game 3-2 after Sherwood waved his hands. And then get relegated. And Leicester won the Premier League.
At 2-0 up, former Aston Villa manager Tim Sherwood decides to hand out some instructions
His arms flail around wildly as he tries to impart some wisdom to his players on the pitch
Villa went on to lose their two-goal advantage,