The 20-year-old forward opened the scoring at Camp Nou and was grateful to his boss for entrusting him with a starting role.“I have to thank the manager for the confidence that he gives me,” Tello told the club\'s official website. “I’m very happy.”The youngster was particularly pleased that Barcelona had claimed a victory which ensured that they remain seven points behind La Liga leaders Real Madrid, who defeated Getafe 1-0 earlier in the evening, and insisted that the Catalans can still retain their title.“We worked hard to win this match because we needed [the win],” he enthused.“There’s a lot of La Liga left and a lot of points [still in play]. We have to fight for the League until the end. “We had a hard time [against Sociedad] but we managed to win the game, it was necessary. Real Madrid can lose and we must be ready [when they do].”Barcelona face Valencia in the Copa del Rey on Wednesday night before returning to Primera Division action against Osasuna next weekend.