Gordon scored a goal, but Barcelona ultimately won the game 2-1 at St. James' Park.
Gordon acknowledged the challenges of playing against a top-ranked team.
"It was a tough game against a very skilled opponent," Gordon said after the match.
"We had some good opportunities, but Barcelona maintained possession and made it hard for us to apply pressure.
They controlled the game through their possession and were able to capitalize on their chances.
Gordon expressed pride in the team's effort and acknowledged the difficulty of the opponent.
"We can be proud of how we played and gave it our best against a top team," Gordon said.
"We didn't think there was much in the game. We had some good moments, but we need to convert them into goals."