Diego Simeone's men fell 1-0 behind after 36 minutes of play when Fernando Torres found the net against his former team, but Adrian, Diego Costa and Arda Turan eventually helped Atleti to a 3-1 win at Stamford Bridge after drawing the first leg 0-0.
"It's been 40 years since this last happened and on May 24 we're going to be there, ready and raring to go," Cerezo was quoted as saying by Marca.
"I did not worry when Chelsea scored the first goal, because I was certain we were going to go through.
"I knew we were going to turn it around and that we would qualify."
Atletico resume La Liga action on Sunday when they take on Levante as they continue their quest for their first domestic title since 1995-96.
They currently hold a four-point lead over second-placed Barcelona with three games to go, while arch-rivals Real Madrid sit third on six points with a game in hand.