After the Bianconeri were 2-0 up with Juan Cuadrado and Blaise Matuidi goals, Atleti fought back with two headers from set plays courtesy of Stefan Savic and Hector Herrera.
Bonucci said, “In the first half, Atletico were pressing a lot and we were a little slow moving the ball, but when we did speed it up, we got into their penalty area.
“It's a pity to concede two goals on set plays. We had a great performance, but we've got to be more focused, because this has happened too many times now. Everyone has to be more concentrated. A side like ours cannot keep conceding this many goals from set plays.
“We got away with it against Napoli and picked up the three points, but tonight we dropped two points and that hurts."
Bonucci was also asked about a row with Cuadrado after the final whistle.
“We were hungry for victory, so there was tension at the final whistle. Everyone should take responsibility for the goals we conceded and we wash our dirty laundry behind closed doors."