Juventus boss Massimiliano Allegri was relieved to kickoff the season with a 1-0 win at Chievo Verona.
Juve relied on an early own goal to clinch the three points.
"More than angry I was a bit worried, because after wasting so many chances we risked an equaliser with the only Chievo chance and Buffon made a great save," Allegri told Sky Sport Italia.
"The team played well, though we need to improve our finishing. At this moment the team is working hard, it was important to win the opener ahead of the break for international duty.
"Today I thought of playing with the three-man defence because of Chievo's characteristics, but also as over the last few days we haven't trained much due to the flu epidemic.
"This system gives us guarantees, but we have worked well on the four-man defence and can adapt to each situation."
