Ruben Amorim was spotted visibly frustrated in the technical area during Manchester United’s 4-4 draw with Bournemouth on Monday evening. The 40-year-old head coach vented his exasperation to his backroom team, specifically targeting Leny Yoro for his criticism.

In footage circulated by a supporter on social media, Amorim was captured gesticulating wildly as he settled back into his seat, before shouting in his native Portuguese: “The ball has gone for half an hour, what is Leny doing?” The precise moment during the match when this outburst took place remains uncertain.

Earlier this month, Amorim suggested Yoro ‘thinks too much’ after the 20-year-old appeared dejected on the substitutes’ bench following his withdrawal in the 54th minute during United’s 2-1 victory at Crystal Palace.

“I also spoke with him because he thinks too much,” Amorim said. “He makes a mistake in the game and then he struggles because he’s too young and he wants to do everything so well. He’s growing with games and with setbacks, it’s not easy for him as a young guy.

“He cannot give that [reaction] to the people, the way he came to the bench. He understands that but he was really frustrated.”

“It shows he cares. He knows it wasn’t his best game but he did some things well and I showed him that. He’s fit and ready for the next challenge.”

United were unable to preserve their lead at Old Trafford, despite going ahead on three separate occasions. Bruno Fernandes and Matheus Cunha struck in rapid succession to make it 4-3 with 10 minutes left on the clock.

Amad and Casemiro also got on the scoresheet but a late Bournemouth equaliser saw more points squandered at Old Trafford.

“It’s really disappointing, we are really disappointed,” said Amorim after the match.

“Crazy game. It might look like we lost the two points in the second half but I think we lost them in the first half. We dominated and created so many chances. We had to go to half-time with a different result.

“In the end we deserved more. It was a fun game for everyone at home. I think we started really well. We did a very good first half. The result should be completely different.

“And then, again, I think six minutes into the second half, similar to Nottingham [Forest], we lost the concentration and they scored two goals, but we managed to get back into the game.

“We score two goals again and then we have to finish the game. A throw-in in our possession, we need to think about, not to go again but to take calm and to close the game.

“In the end, it was a fun game.”