Barcelona manager, Ernesto Valverede, has warned his side as they prepare to face Manchester United in the Champions League, saying that they "have something special at the end of matches".
The LaLiga champions hold a 1-0 lead from the first leg at Old Trafford.
United advanced to the quarter-finals by overturning a 2-0 first leg deficit against PSG in the round of 16. They won that tie through a controversial penalty awarded by VAR and converted by Marcus Rashford in stoppage time.
Valverde was asked at a press conference on Monday, whether Ousmane Dembele will feature in Tuesday's game after the winger returned from injury at the weekend.
"It will be important who starts, but also those that finish the game, because Manchester United have something special at the end of matches.
"Manchester United have won three of four [Champions League] away games this season, and we have to be careful. The first leg result is not definitive," he replied.
Valverde was asked what he feared about Barcelona's opponents, and responded: "Their spirit - also the power and pace they have in their side. If you give them space, they're quick and efficient.
"We respect what they have done, what they are and the history they have behind them."