"I think the away goal could come into it if we get the first goal (in the second leg). If we can get the first goal we only need one more.
"They are a quality side and we have to give them respect, but we showed tonight if we are ambitious we can hurt a team."
In Turkey, Fenerbahce scored twice in the final 12 minutes to claim a 2-0 win over Italian side Lazio.
Pierre Webo and Dirk Kuyt were both on target for the home side in Istanbul, which proved too strong for a Lazio team forced to play with 10-men after Ogenyi Onazi was shown the red card three minutes after the break.
Meanwhile, Barcelona confirmed it has lodged a formal complaint with UEFA following the performance of German referee Wolfgang Stark during Tuesday's 2-2 Champions League draw at Paris Saint-Germain.
The La Liga leader was unhappy that the official failed to stop play during the quarterfinal first leg tie while Javier Mascherano and Jordi Alba were both left prostrate following a collision in the penalty area.
"The club has written to UEFA due to a series of incidents on the pitch in the understanding that objectively speaking it was evident that the referee did not apply the rules of the game," Barca spokesman Toni Freixa told a news conference Thursday.
"When two players from the same team are on the floor the referee should stop the match, which did not happen.
"What's more he then obliged them to leave the pitch, in contravention of the rules.
"An incident that is sufficiently serious in a competition like the Champions League to bring to UEFA's attention so that it does not happen again."
Barca also made public its annoyance at the failure of the officials to rule out Zlatan Ibrahimovic's strike, which came with the forward in an offside position.
The Swede's 79th minute effort, which made the score 1-1, was fiercely contested by the Barcelona players.
"We are fully conscious of the possibility of errors in refereeing and we do not consider ourselves badly treated," Freixa said.
"But it surprises us that in a high-level competition a referee does not know the rules.
"We are not judging the work of referees but the basic principle that a judge should know the law. We hope it does not happen again."