Paris Saint-Germain defender Thiago Silva has warned his team-mates Barcelona are always capable of doing the unexpected.
The Brazil international is full of respect for the La Liga giants, but is nonetheless hopeful of springing a surprise in the UEFA Champions League quarter-final.
"Barca are so versatile they're capable of doing something completely unexpected, which can end up making you look silly," Silva told Fifa.com.
"They've got the best team in the world, the best player, and several others who help him out with their passing and movement.
"In any case, we're going to focus on the first leg, try and get a great result at home and then try and clinch qualification at Camp Nou.
"Barcelona are always favourites, whatever team they're playing against. And they deserve to be too, thanks to their recent track record and the incredibly high standards they hit.
"But I always say that this (favourites' status) is an off-the-pitch thing. On it, we've got the chance to turn that on its head. They'll be two tough games between two great teams.
"They'll be aiming for the title, just as we are, so we'll be trying to stop them.
"We've maybe got a little less experience than they do, but we've got a quality squad packed with players used to decisive matches."