Ronaldinho and Massimo Ambrosini hit the frame of the goal at the Stadio Dall'Ara.
"I don't think I can make any complaints about my squad this afternoon," insisted Leonardo.
"The only thing we were missing was the goal. I usually don't believe in good luck, but it certainly didn't make an appearance today."
He added: "In recent games we had struggled in the final third, but I think today there was an improvement.
"We created many chances and good fortune was not on our side. We did what we could against a very well-organised Bologna.
"If we had been able to just break the deadlock, it would have changed the whole game."