Ange Postecoglou was spotted berating his Tottenham players in furious touchline rant during their latest pre-season friendly.
Spurs are currently abroad on a tour of Asia ahead of the new Premier League season.
They beat Japanese side Vissel Kobe 3-2 on Saturday, with Pedro Porro, Son Heung-min and Mikey Moore scoring the goals for the north London club.
Tottenham continued their tour by travelling to South Korea to take on a K-League XI on Wednesday morning at the Seoul World Cup Stadium.
After a goalless first quarter of the match, Postecoglou struggled to hide his frustration with his players.
During a water break midway through the first half, the Australian was filmed shouting at his starting XI during a team talk – urging them to go "man to man" with their opponents.
"I've got one f***ing thing to say. We go and have a crack," shouted Postecoglou.
"We're going on the press, man for man. Just go man for man!"
Tottenham fans on social media were quick to praise Postecoglou for his passionate speech and desire to win.
"Proper manager," one supporter posted on X.
While another added: "Ange needs to stay healthy to win this team trophy."
Postecoglou's rant clearly had an effect on his players, with Tottenham going on to score three unanswered first-half goals through Dejan Kulusevski and a brace from Son.
But the K-League XI bounced back after the break, with FC Seoul striker Stanislav Iljutcenko scoring two goals in as many minutes to cut Spurs' lead to just one.
Tottenham's nerves looked to be settled with 15 minutes to go when youngster Will Lankshear added a fourth for the Premier League club.
But the Korean side hit back again through Oberdan Alionco de Lima nine minutes from time to set up a tense finish.
Spurs eventually held on to win 4-3 and will next face Bayern Munich in a friendly in Germany on Saturday before replaying the fixture in London on August 10.
They will then face Leicester in their opening game of the new Premier League season on August 19.