"When you have so many chances, it is always disappointing not to win," he said. "In the first half we didn't play with the right approach, while in the second half we had the right fighting spirit and we created plenty of chances.
"We had to be more determined in front of goal, but I still think the performance was good in the second half.
"Our opponents had good possession in the first half, while in the second half we put them in trouble, but unfortunately didn't manage to score more than one goal."
Juventus are currently third in their group with three points from as many matches.