Rasmus Hojlund couldn't hide his surprise at seeing Kobbie Mainoo being substituted against Burnley.
The young midfielder was replaced by Erik ten Hag in the 65th minute of the clash at Old Trafford with the scores tied at 0-0 at the time.
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That decision was met with boos from the Manchester United fans, who weren't impressed at the decision to replace the wonderkid.
Alongside Mainoo, Hojlund was also subbed off with the pair being replaced by Amad Diallo and Scott McTominay.
In footage captured from a fan in the stand, the Danish striker was seen walking around the pitch to the dugout when Mainoo's number was held up.
Responding to the decision, Hojlund could be seen tilting his head with a bemused look on his face.
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Ten Hag was questioned about the decision post-match and stuck to his guns, saying: "I am the manager and have to decide what the team needs.
"It was the right decision and totally logical to bring off very young players who are in their first year of the Premier League and feel some fatigue.
"They [Mainoo and Hojlund] have both had injuries this season and I want to protect them."
Man United went on to take the lead through Antony before Zeki Amdouni's late penalty denied the Red Devils all three points.
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That result, plus Aston Villa's draw to Chelsea later on Saturday means Man United will not finish in the top four.
With fifth place unlikely to be awarded to the Premier League for a bonus place in the Champions League, the 20-time English champions will have to settle for either Europa League, or even Conference League football.
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