A first-half goal by Danylo Sikan gave the Ukrainian outfit all three points in Hamburg.
It was a fine finish by Sikan, whose looping header beat Marc-Andre ter Stegen, however, it was his celebration that caught the eyes of fans.
Sikan lofted both arms in the air, which bears a striking resemblance to England and Real Madrid superstar Bellingham's iconic celebration.
Whether Sikan was mimicking Bellingham isn't clear but there are plenty of fans who are convinced he was.
"Danylo Sikan scored the winner against Barca and dropped the Bellingham celebration infront on them... Beautiful," one wrote on Twitter.
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"Danylo Sikan doing the Bellingham celebration after scoring against Barcelona. That's hilarious and awesome," another said.
"Danylo Sikan celebrates Jude Bellingham after scoring against Barcelona [laugh emoji]. It's so cold," this fan added.
"Danylo Sikan hit the Bellingham celebration after scoring against Barcelona. Madridistas will be happy about this," another added.
"Bellingham finished his job in Sikan [skull and handshake emoji]," this fan declared.
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That may be in reference to Bellingham's heroics in El Clasico last month, which saw him score twice as Real Madrid came from behind to beat Barca 2-1.
And of course, his celebration was in full flow that afternoon in Catalonia.