"If I had to single out one of the youngsters [who played against Girona], I would say Konrad. I'm very happy with him," Koeman said.
"But we also have Pedri, Riqui... We have a great future ahead of us."
Konrad also spoke after the match, assuring that it is a dream to be playing in the Barcelona first team, even if it is only pre-season.
"I am very happy to have this opportunity to play in the first team," he noted.
"It has been my goal and dream since I was a child and I am happy to make it come true.
"I am very grateful for the opportunity I have been given.
"Now I have to believe in myself and have confidence.
"Being here, in the first team, with the best players in the world, makes you much better as a player and I'm taking advantage of it to learn from them."