Bayern struck first with only two minutes on the clock when Toni Kroos was allowed acres of space inside the Napoli box before placing his shot into the corner.
Napoli, who have not lost at home since returning to European competition three years ago, equalised on 39 minutes when Christian Maggio's right-wing cross was deflected into the net by Holger Badstuber's lunging dive.
"Some people said that at this stage we would be bottom," he told reporters. "We haven't set targets so after each game we have to see where we are.
"Our boys are not used to games like these. After their goal we changed tactics and played a great game. This is one of the best sides in Europe - they've won twice already in the group. In the end, we could even have won it."
"I'm not a prophet, but I'm confident now we will qualify," he told reporters. "We came here to win - and I think we deserved the win - but I'm fairly happy with a draw.
"We went at Napoli at the start, controlled the game and stayed tight at the back. Napoli played with a lot of heart and I think they stand a good chance of qualifying too."
The German giants made the perfect start on two minutes when Kroos collected Thomas Muller's pass and ran through the heart of the Napoli defence before calmly side-footing the ball past De Sanctis's despairing dive to silence the home fans.
Napoli tried to respond to the body-blow immediately, but Hugo Campagnaro's seventh-minute drive whistled the wrong side of the post.
There was more deafening noise after half-time but jeers when Paolo Cannavaro was adjudged to have handled Gomez's fierce shot. The cheers returned when De Sanctis dived to his left to save Gomez's weakly hit spot-kick.
Napoli, back in Europe's premier competition fo
