As the Red Devils arrived at Old Trafford prior to their Premier League clash against Everton, the players spent some time signing autographs for fans before heading inside.
Despite the inclement weather leading up to the game, the rain held off for those supporters who were desperate to meet their heroes.
However, one fan's request for Casemiro left the Brazilian with a scrunched look on his face.
The defensive midfielder made his way across the line of fans but stopped once he got to an individual who held out a shirt with Garnacho on the back.
Upon seeing his teammate's name on the back, Casemiro said: "Garnacho?"
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He happily obliged in signing the shirt, but the defensive midfielder jokingly sported a disapproving look on his face.
However, Casemiro soon had to change his focus to the game against Everton, where he was named in the starting line-up.
As for Garnacho, he was named as a substitute in new United boss Ruben Amorim's second game in charge at Old Trafford.
The hosts couldn't have asked for a better start either as Marcus Rashford scored his second goal in as many league games in the 34th minute.
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On set piece duties, United skipper Bruno Fernandes lasered a pass to Rashford, who was waiting on the edge of the box.
Rashford's effort looked to be going well wide but unfortunately for Everton, it took a wicked deflection off of Jarrod Branthwaite and past a helpless Jordan Pickford.
Summer signing Joshua Zirkzee doubled United's advantage seven minutes later.
Amad Diallo, playing as the right wing-back in Amorim's preferred 3-4-2-1 set-up, picked his man's pocket and released Fernandes into space.
As he closed in on goal, Fernandes took the unselfish option and elected to square the ball to Zirkzee.
The Dutch international made no mistake with the finish, registering his second goal in United colours since his opening-day strike against Fulham.