Barcelona's 5th-minute goal didn't unsettle Juventus' game plan. The Italian giants remained patient and defensive while waiting for chances to counterattack. But in so doing, they allowed Barcelona to continue dominating possession.
The Barcelona players were really on fire after scoring the early opening goal. They continued avoiding Barcelona's midfield while repeatedly utilizing the spaces on the flanks to advance the ball out of the final third. Their Tiki-taka was as potent as ever as they went at Juventus with everything they got.
But, like with every football match, even the best of teams could commit some mistakes. Even the best players could misplace a pass or two, or fail to dribble past an opponent, thereby gifting possession to the opponent. That was what happened during the 16th minute of gameplay.