The pics appeared to have been taken after Barca's 6-1 victory over Olympiacos on Tuesday at Lluis Companys Olympic Stadium.
Champions League's official Instagram page posted pictures of Barcelona star Lamine Yamal with his girlfriend Nicki Nicole
Fans were left baffled from the content the Champions League page shared
The Champions League page shared a pic of Yamal and Nicole from the victory over Olympiacos
It showed Yamal, 18, and his singer girlfriend Nicki Nicole sitting on the bench and enjoying the win.
The snaps attracted almost 1.5million likes on Instagram, but many fans were left confused with the content.
A number of supporters correctly pointed out that it is highly irregular for the Champions League page to be sharing pictures of footballers with their significant others.
Some went even further as they wondered whether the Uefa page got hacked.
One fan posted: "Champions League??! Or account got hacked?"
Another commented: "Why UCL focusing on this?"
A third wrote: "Post about football, not couples."
This fan said: "I haven't seen UCL page posting Couple before Lmao."
And that one added: "Game's gone."
Yamal and Nicole, 25, have been linked ever since early summer when she attended his 18th birthday party in July.
But they only confirmed the rumours in August, when the Barcelona star posted a picture of them for her 25th birthday.
And the rapper confirmed she is "very happy" with the Spain international.