The Catalan club were hit with a transfer embargo, to be applied for the next two windows, earlier this week for irregularities in their dealings at youth level, but have since confirmed their intention to appeal the sanction.
Gerardo Martino's side at least provided cheer on the field on Saturday, winning 3-1 against Real Betis to stay firmly in contention for the La Liga title.
Barca have already won the Supercopa de Espana earlier this season by beating Atletico Madrid on away goals and will need to get past Diego Simeone's men again in the second leg of their UEFA Champions League quarter-final clash on Wednesday, following a 1-1 draw earlier this week.
"We play the game - this group of players has experienced nearly every kind situation," Mascherano told Barca's official website.
"The team needs to try to show what Barca is through football. Everything else isn't our concern
"We have the chance to win it all and we won't give up despite what's happening at the club."
"We've had bad luck with injuries, but this group has shown that it can overcome delicate situations; we must overcome this and do our best," Bartra said.
"I'm very optimistic (for the Atletico game), we'll go all out at the Calderon with the hope of going through to the next round."
