Referees and managers don’t always see eye-to-eye.
Managers are usually blinkered when it comes to specific incidents during matches - although Jurgen Klinsmann had every right to feel aggrieved with the Panamanian match official Jafeth Perea during the United States’ friendly against Cuba on Friday.
The US were leading 2-0 in the 80th minute when substitute Steve Birnbaum was kicked in the head by Duxney Espinosa.
Everyone inside the Estadio Pedro Marrero must have expected Perea to blow his whistle; the foul was as clear as day.
However, the referee waved play on and Cuba very nearly pulled a goal back from the resulting attack.
Video: Klinsmann tears into the referee
Klinsmann was apoplectic with rage.
“Are you f***ing blind?!” the former striker screamed out three times towards Perea.
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Birnbaum, meanwhile, lay flat out on the ground with blood streaming out of his forehead.
Commentator apologises for Klinsmann's outburst
Klinsmann’s explicit outburst was heard by viewers watching on ESPN 2, forcing commentator Ian Darke to apologise.
“Well, apologies if you’re catching any of the industrial language from the sidelines from a microphone, but I think the gist of the message was the one that you was saying Taylor [Twellman].”
Twellman, the co-commentator, then added: “Well, that’s Jurgen Klinsmann on the sidelines. He’s 100 per cent correct, Ian.”
Klinsmann criticises state of the pitch
Klinsmann, whose side recorded a 2-0 win thanks to goals from Chris Wondolowski and Julian Green, also criticised the state of the pitch.
"The field was a field that was not playable," he was quoted as saying by ESPN. "On that field, it's impossible to get a higher rhythm, a higher tempo, higher pace.
"We knew that is was going to be difficult on this field."
Was Jurgen Klinsmann right to go mental at the referee? Have your say by leaving a comment below.