Barcelona were away to Porto at the Estadio do Dragao, for our second Champions League group stage game of the season.
One quick break from Ferran Torres was enough to secure all three points with a slender 1-0 win.
It was Gundogan who gave Torres an assist for the goal, in what was a resolute Barca performance.
Besides the assist, Xavi was generally pleased with how Gundogan controlled the midfield.
Xavi said: We lacked patience and calm on the pitch, but one of the people who gave us that was Gundogan.
“Gundogan is a guarantee and a privilege to have him in the team. He is a player who does not lose the ball. He creates chances for us.”