The Blaugrana boss warned his team before the quarter-final clash in Europe's premier club competition
Barcelona coach Ernesto Valverede has urged caution as his side prepare to face Manchester United in the Champions League, who he says ‘have something special at the end of matches’.
Barcelona hold a 1-0 lead after the first leg at Old Trafford before facing the Red Devils at Camp Nou on Tuesday.
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.