The 49-year-old coach says the Bianconeri were good value for their victory at the Stadio Olimpico
The Bianconeri edged closer to retaining their Serie A crown, with Arturo Vidal's double enough to secure all three points.
Petkovic, who went into the game boasting the superior head-to-head record against counterpart Antonio Conte this season, cited exhaustion as a possible reason for the defeat, but did not detract from the performance of the champions-elect.
"We dominated them in the first few minutes. After this, we gave Juventus opportunities and they were clinical with the two chances we gave them. I think the two goals were avoidable," he told Sky Sport Italia.
"In the end, kudos to Juventus because they deserved the victory. Surely we have seen the team are a little tired having played five times in a few weeks.
"Today we were without seven players. I hope they can recover as soon as possible for all of them to be available to finish the season strong."
The Biancocelesti's next league test comes against Udinese on Sunday.