The Argentine insists the Blaugrana should not feel sorry for themselves despite losing a game that they dominated, only to be hit with a sucker punch from Didier Drogba.Javier Mascherano argued that Barcelona should not dwell on the disappointment of Wednesday night\'s Champions League semi-final first-leg defeat by Chelsea, claiming that qualification remains within the Catalans\' hands.The Blaugrana dominated the game in west London and created a succession of clear-cut chances but were punished for their profligacy by Didier Drogba, who popped up with the winner just before the break.However, rather than feel sorry for themselves after losing a much that they should have won, Pep Guardiola\'s men must, according to Mascherano, immediately focus on making amends at Camp Nou on Tuesday.\"No regrets,\" the Argentine declared shortly after the full-time whistle at Stamford Bridge. \"This is the result and now it just depends on us. It\'s in our hands.\"We have to try to win knowing that we cannot grant them any opportunities to score a goal.\"We have to keep our concentration in order to protect our goal and thus give the forwards freedom to attack and score.\"Before tackling Chelsea in the return leg in Catalunya, Barca will host Real Madrid in a crucial La Liga clash on Saturday evening.