The Blues, back in the Champions League after a one-year absence, got off to the best possible start with a dominant performance against the Azeri debutants.
Antonio Conte's charges endured a difficult summer off the pitch and began their Premier League campaign with a loss to Burnley, but Fabregas believes that they are now finding their feet.
Speaking after the game, the Spaniard told BT Sport: "It's a good performance, a good result.
"You never know if goals [difference] will count at the end of the group stage. I think it's a good performance from everyone. We are getting back to our best.
"We rotated five players. We have nine games in 21 days. It's a difficult period. We weren't used to this last year as we weren't in the Champions League."
In Group C's other game, Roma and Atletico Madrid played out a goalless draw.