Ruben Amorim's immediate reaction to Marcus Rashford putting Manchester United 1-0 ahead against Ipswich has been spotted by fans.
Amorim is taking charge of his first game as United manager after officially being appointed during the international break on November 11.
The 39-year-old sprung a few surprises in his first team selection, with Noussair Mazraoui playing on the right of a back three and Amad Diallo lining up at right wing-back.
And it was Amad that combined to give Amorim a dream start to life in English football inside just one minute and 20 seconds.
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The Ivory Coast international sprinted down the right flank and past several players before whipping the ball into the penalty box, with Rashford on hand to reach the ball first and divert it past Ipswich goalkeeper Arijanet Muric.
Rashford wheeled away in celebration - but fans spotted what Amorim did that they think might define his United era.
The Portuguese simply sat in his seat and watched on as his players celebrated, before taking a sip from his water bottle.
And United fans on social media loved it.
One wrote: "Amorim is COLD. Man didn't even celebrate."
A second said: "Amorim didn't celebrate? My manager."
And a third added: "Amorim didn't even celebrate that goal at all. We've actually won."
United went into the clash at Portman Road knowing that a win would take them back into the top half of the Premier League table after a difficult start to the season.
Speaking in his first interview as manager, Amorim spoke about the fundamental change he wants to make to help United get back up the table and compete for titles again.
He said: "I know that the manager or head coach is so important in the club because you have in your hands the engine of the club. I understand that. But I want to be part of something.
"I don't just want to be in charge. So I want everybody together. It will be more fun and so much easier to reach the goals."
Topics: Manchester United, Marcus Rashford, Ruben Amorim, Fan Reactions
Ryan Smart