Barcelona coach Luis Enrique has said Manchester City's difficult recent run of results could make them more dangerous in Wednesday's Champions League clash at the Camp Nou.
Barca won last month's first leg in Manchester 2-1, with Luis Suarez scoring twice, and their advantage could have been even greater had Lionel Messi's late penalty not been saved by Joe Hart.
City have won only three of their last 11 games in all competitions, and were beaten 1-0 by Burnley in the Premier League on Saturday.
But Luis Enrique told his prematch news conference the wounded Premier League champions would be capable of fighting back.
"Whenever rival teams are in these situations, they can either be very dangerous, or it could be better for us," he said. "We know we are taking on one of the favourites for the tournament.
"They have the potential to make things difficult for us. We saw that in the first game, despite our good start, so we are not taking anything for granted."
He said his players needed to play even better than they had done in Manchester, where Sergio Aguero scored City's goal, to ensure they progressed to the quarterfinals.
"We never set up defensively -- we always go out to win the game," he said. "To try and play percentages would be very dangerous.
"We focus on beating the opponent, trying to overcome them. All of us would like the team to show the same performance, attitude, and efficiency as the first game."
Luis Enrique stressed that neither he nor his team would be distracted by Sunday's clasico at home to a troubled Real Madrid, saying: "There are not two games for us to think about, just the one we are playing tomorrow. All other games do not interest me."
After confirming that defensive midfielder Sergio Busquets would miss the City game with an ankle injury, he indicated that Javier Mascherano would take the central position on Wednesday, likely to mean Jeremy Mathieu filling in at centre-back.
And he predicted that City coach Manuel Pellegrini would stick to the 4-4-2 formation he had used in the first leg, despite many critics feeling it had made them too open.
"They are without [Gael] Clichy, but will bring in [Yaya] Toure," he added. "I do not expect many surprises. It [the first leg] was a difficult game, and I expect a very similar game."
He praised his attacking trio of Messi, Neymar and Luis Suarez, but warned that they "cannot all score hat-tricks at the same time" after some pundits questioned Neymar's recent form.
"The three have all shone brilliantly during the whole season, in numbers, attitude, assists, defensive work," he said.
"They cannot all score hat-tricks at the same time, not in this sport. But their performances in all areas have really stood up."