One supporter, who says he's a Manchester City and Los Angeles FC fan, was attempting to get his USA and Borussia Dortmund Pulisic shirts signed, only for another name to end up in ink.
Chelsea are currently on a pre-season tour of the states, playing Club America, Charlotte FC and Arsenal with the main attraction being their US-born no.10.
Pulisic, 23, who signed from Dortmund for £58million in 2019, is the star and captain of the national side, managing 21 goals in 51 international games, drawing fans over for Chelsea's long-awaited tour that was delayed by the COVID-19 pandemic.
Thomas Tuchel's men are currently in Los Angeles training for their opening match against Club America, with a pair of fans making the trip to potentially get an autograph from Pulisic, only to be left disappointed.
After handing over their Dortmund, US and Chelsea kits for signings, they instead ended up with the signature of Italian midfielder Jorginho, and went home heartbroken.
Justin Tweeted: "Yesterday I attempted to get [Christian Pulisic] to sign his USA & Dortmund kits at Chelsea training (he didn't).
"Instead Jorginho shockingly walked up and immediately signed both without asking.
"I have no idea why, nobody else did. My jerseys are now ruined and I'm very disappointed."
Another fan named Ruso Munoz replied to Justin with his Jorginho signed Pulisic shirt saying, "He did the same to me bro it f***** hurts."
Justin also dismissed claims that he was trying to get the shirts signed to sell them, unlike one fan who compared him to Cristiano Ronaldo and Lionel Messi on a TV auction show.
Appearing on US reality series Pawn Stars, one fan was seen trying to shift his signed Pulisic shirt last year, with the Chelsea forward called 'the Lebron James of soccer'.
And, as it turns out, he wasn't the only one who rated Pulisic highly, despite 2021 Ballon d'Or finalist Jorginho arguably being a bigger name outside of the States.