City kick-off their European campaign with an away leg against Atletico Madrid in the Round of 32 on Thursday 13 September.
Wullaert has a wealth of experience in the competition, reaching the final against Lyon with former club Wolfsburg last season.
Wolfsburg slipped to a defeat against the French outfit and the Belgian striker is hungry to lift the prestigious trophy, and believes she can do it in the City shirt.
“I’m convinced we can win,” Wullaert told the media at the pre-match press conference. “Myself and the team never go into game thinking we could lose.
“We always want to win, so that’s how we will go into the game against Atletico.
“Of course, I came to City because I want to win the Champions League in my career.
“I’m convinced that we can do it with this team as we have a lot of quality.
“We play a little bit different to my former club, Wolfsburg, as City keep the ball more and the style suits me better. I’m enjoying my time here at Manchester City and I hope we will win.”
The 25-year-old went head-to-head with the Spanish side last season, securing a 3-0 win in the first leg, followed by a staggering 12-2 victory in the second, so our summer signing knows the side well.
“They play the Spanish way so they keep the ball a lot,” Tessa added. “First half was difficult here, but we won it in the second half when we scored three goals.
“They’re a good team and they’re champions, but were a good team too and we can manage teams like that.”